Even though the sub is called superheroes I feel like superheroes outside of Marvel and DC often don't get the respect and attention they deserve, so this is a list just for them.

Rules:

1. Both morally pure traditional superheroes and morally grey heroes like anti-heroes are allowed.
2. Obviously superheroes from superhero comics outside of Marvel and DC are allowed.
3. Superheroes originating from animated content are allowed.
4. Superheroes originating from live action content are allowed.
5. Superheroes originating from video games are allowed.
6. Superheroes originating from literature other than comics (books/novels, mangas, comic strips, etc) are allowed.
7. Heroes, who are definitely not traditional superheroes (don't wear a costume and a cape, don't have a secret identity), yet they have superpowers and carry a lot of other traits from the superhero genre are allowed for discussion (For example: Optimus Prime, Luke Skywalker, Avatar Aang, etc)

Results:

1. Spawn (Al Simmons) - Appearances: Spawn (1992- ) Image Comics Series by Todd McFarlane; Todd McFarlane's Spawn (1997-1999) Animated Series; Spawn (1997) Live-Action Movie, Mortal Kombat 11 Video Game, Spawn: Armageddon (2003) Video Game
2. Teenage Mutant Ninja Turtles (Leonardo, Raphael, Donatello, Michelangelo) - Appearances: TMNT Mirage Studios Comics (1984-2014), TMNT IDW Comics (2010- ), TMNT (1987-1996) Animated Series, TMNT (2003-2009) Animated Series, Nickelodeon's TMNT Animated Series (2012-2017), TMNT (1990) Live-Action Movie, TMNT (2007) Animated Movie, TMNT (2014) Live-Action Movie, TMNT: Mutant Mayhem (2023) Animated Movie, TMNT: Turtles in Time (1991) Video Game, TMNT: Shredder's Revenge (2022) Video Game, TMNT: Cowabunga Collection (2022) Video Game
3. Invincible (Mark Grayson) - Appearances: Invincible (2003-2018) Image Comics Series by Robert Kirkman, Invincible (2021- ) Animated Series, Invincible Vs (2026) Video Game
4. Hellboy - Appearances: Hellboy (1994- ) Dark Horse Comics Series by Mike Mignola, Hellboy and the B.P.R.D (2014- ) Dark Horse Comics Series by Mike Mignola, Hellboy (2004) Live-Action Movie, Hellboy II: The Golden Army (2008) Live-Action Movie, Hellboy (2019) Live-Action Movie, Hellboy: The Crooked Man (2024) Live-Action Movie, Hellboy: Sword of Storms (2006) Animated Movie, Hellboy: Blood and Iron (2007) Animated Movie, Hellboy: The Science of Evil (2008) Video Game, Hellboy: Web of Wyrd (2023) Video Game
5. Ben 10 (Benjamin Tennyson) - Appearances: Ben 10 Classic (2005-2008) Animated Series, Ben 10: Alien Force (2008-2010) Animated Series, Ben 10: Ultimate Alien (2010-2012) Animated Series, Ben 10: Omniverse (2012-2014) Animated Series, Ben 10: Secret of the Omnitrix (2007) Animated Movie, Ben 10/Generator Rex: Heroes United (2011) Animated Special, Ben 10: Protector of Earth (2007) Video Game, Ben 10: Alien Force - Vilgax Attacks (2009) Video Game, Ben 10: Ultimate Alien - Cosmic Destruction (2010) Video Game, Ben 10: Omniverse 1 & 2 (2012 & 2013) Video Games
6. Optimus Prime - Appearances: Transformers (1984-1991) Marvel Comics Series, Transformers (2005-2018) IDW Comics Series, Transformers (1984-1987) Animated Series, Transformers (1986) Animated Movie, Transformers: Armada (2002-2003) Animated Series, Transformers: Energon (2004-2005) Animated Series, Transformers: Cyberton (2005-2006) Animated Series, Transformers (2007) Live-Action Movie, Transformers: Revenge of the Fallen (2009) Live-Action Movie, Transformers: Dark of the Moon (2011) Live-Action Movie, Transformers: Age of Extinction (2014) Live-Action Movie, Transformers: The Last Knight (2017) Live-Action Movie, Transformers: Animated (2007-2009) Animated Series, Transformers: Prime (2010-2013) Animated Series, Transformers: War for Cybertron (2010) Video Game, Transformers One (2024) Animated Movie
7. The Tick - Appearances: The Tick (1988-1993) Comics Series by Ben Edlund, The Tick (1994-1997) Animated Series, The Tick (2001-2002) Live-Action Series, The Tick (2016-2019 Live-Action Series, The Tick (1994) Video Game
8. Power Rangers - Appearances: Mighty Morphing Power Rangers (1993-1996) Live-Action Series, Mighty Morphing Power Rangers: The Movie (1995) Live-Action Movie, Power Rangers in Space (1998) Live-Action Series, Power Rangers Lost Galaxy (1999) Live-Action Series, Power Rangers Time Force (2001) Live-Action Series, Power Rangers Ninja Storm (2003) Live-Action Series, Power Rangers Dino Thunder (2004) Live-Action Series, Power Rangers S.P.D (2005) Live-Action Series, Power Rangers Jungle Fury (2008) Live-Action Series, Power Rangers RPM (2009) Live-Action Series, Power Rangers Dino Charge (2015) Live-Action Series, Mighty Morphing Power Rangers (2016-2024) Comics by BOOM!, Power Rangers: Battle for the Grid (2019) Video Game
9. Ultraman - Appearances: Ultraman (1966) Live-Action Series, Ultraseven (1967) Live-Action Series, Return of Ultraman (1971) Live-Action Series, Ultraman Tiga (1996) Live-Action Series, Ultraman Nexus (2004) Live-Action Series, Ultraman Mebius (2006) Live-Action Series, Ultraman Orb (2016) Live-Action Series, Ultraman Geed (2017) Live-Action Series, Ultraman Z (2020) Live-Action Series, Shin Ultraman (2022) Live-Action Movie, Ultraman Rising (2024) Live-Action Movie, Ultraman Figthing Evolution 3 (2004) Video Game, Ultraman Figthing Evolution Rebirth (2005) Video Game, Ultraman (2011-2020) Manga by Eiichi Shimizu
10. The Incredibles (Mr. Incredible, Elastigirl, Dash, Violet) - Appearances: Incredibles (2004) Animated Movie, Incredibles 2 (2018) Animated Movie, Incredibles (2004) Video Game, Incredibles: Rise of the Underminer (2005) Video Game, Disney Infinity 1.0 (2013) Video Game, Lego Incredibles (2019) Video Game
11. Zorro (Don Diego de la Vega) - Appearances: The Curse of Capistrano (1919) Novel by Johnston McCulley, The Mark of Zorro (1920) Live-Action Silent Movie, The Further Adventures of Zorro (1922) Novel by Johnston McCulley, Zorro Rides Again (1931) Novel by Johnston McCulley, The Mark of Zorro (1940) Live-Action Movie, Zorro (1957-1959) Live-Action Series by Walt Disney, The New Adventures of Zorro (1981) Animated Series, Zorro (1990-1993) Live-Action Series, The Legend of Zorro (1996) Anime, The Mask of Zorro (1998) Live-Action Movie, The Legend of Zorro (2005) Live-Action Movie, Zorro Chronicles (2015-2016) Animated Series, Zorro the Chronicles (2022) Video Game, Zorro (2024) Live-Action Series
12. Sailor Moon and the Sailor Scouts (Usagi Tsukino, Ami Mizuno, Rei Hino, Makoto Kino, Minako Aino) - Appearances: Sailor Moon Manga (1992-1997) by Naoko Takeuchi, Codename: Sailor V (1991-1997) Manga, Sailor Moon (1992-1997) Anime, Sailor Moon R: The Promise of the Rose (1993) Animated Movie, Sailor Moon S: Hearts on Ice (1994) Animated Movie, Sailor Moon Super S: Black Dream Hole (1995) Animated Movie, Sailor Moon Crystal (2014–2016) Anime, Sailor Moon Eternal (2021) Animate Movie, Sailor Moon Cosmos (2023) Animated Movie, Pretty Guardian Sailor Moon (2003-2004) Live-Action Series, Sailor Moon: Another Story (1995) Video Game, Pretty Soldier Sailor Moon Arcade (1995) Video Game
13. The Phantom (Christopher "Kit" Walker) - Appearances: The Daily Newspaper Strip (1936) Comic Strip, The Sunday Strip (1939) Comic Strip, Ace Comics (1937-1949), Feature Books (1937-1948), The Phantom (1962-1977) Comics Series, The Phantom (1988) Comics Miniseries, The Phantom (1989-1990) Comics Series, The Phantom (1995) Comics Miniseries, The Phantom (2003-2009) Comics Series, The Phantom: Ghost Killer (2010) Comics Miniseries, The Last Phantom (2010-2012) Comics Series, Kings Watch (2013-2014) Comics Series, The Phantom (2014-2015) Comics Series, Phantom: Danger in the Forbidden City (2014-2016) Comisc Miniseries, The Phantom (1943) Movie Serial, Defenders of the Earth (1986-1991) Animated Series, Phantom 2040 (1994-1996) Animated Series, The Phantom (1996) Live-Action Movie, The Phantom (2009) Miniseries, The Phantom (2024) Video Game
14. He-Man (Price Adam) - Appearances: Mattel Toy Minicomics (1981-1989) Comics Series, Masters of the Universe (1982-1983) Comic Miniseries, Masters of the Universe (1986-1988) Comics Series, He-Man and the Masters of the Universe (2012-2013) Comics Series, He-Man: The Eternity War (2014-2015) Comics Series, He-Man and the Masters of the Multiverse (2019-2020) Comics Series, Masters of the Universe: Revelation (2021-2022) Comics Series, He-Man and the Masters of the Universe (1983-1985) Animated Series, She-Ra: Princess of Power (1985-1987) Animated Series, New Adventures of He-Man (1990-1991) Animated Series, He-Man and the Masters of the Universe (2002-2004), He-Man and the Masters of the Universe (2021-2022) Animated Series, Masters of the Universe: Revelation (2021-2024) Animated Series, The Secret of the Sword (1985) Animated Movie, Masters of the Universe (1987) Live-Action Movie, Masters of the Universe (2026) Live-Action Movie
15. All Might (Toshinori Yagi) - Appearances: My Hero Academia (2014-2024) Manga, My Hero Academia: Vigilantes (2016-2022) Manga, All Might Rising (2018) One-Shot Manga, My Hero Academia (2016-2026) Anime, My Hero Academia: Two Heroes (2018) Animated Movie, My Hero Academia: Heroes Rising (2019) Animated Movie, My Hero Academia: World Heroes' Mission (2021) Animated Movie, My Hero Academia: You're Next (2024) Animated Movie, My Hero One's Justice 1 & 2 (2018 & 2020) Video Games
16. Powerpuff Girls (Blossom, Bubbles, Buttercup) - Appearances: Powerpuff Girls (1998-2005) Animated Series, Powerpuff Girls Z (2006-2007) Anime, Powerpuff Girls (2016-2019) Animated Series, Powerpuff Girls (2002) Animated Movie, Powerpuff Girls: Relish Rampage (2002) Video Game, Powerpuff Girls: Defenders of Townsville (2014) Video Game, Powerpuff Girls (2000-2006) Comics Series by DC, Powerpuff Girls (2016-2017) Comics Series by IDW
17. Saitama (One-Punch Man/Caped Baldy) - Appearances: One-Punch Man (2009- ) Webcomic, One-Punch Man (2012- ) Manga, One-Punch Man (2015- ) Anime, One-Punch Man: A Hero Nobody Knows (2020) Video Game
18. Judge Dredd (Joseph Dredd) - Appearances: 2000 AD. (1977- ) Comics Series, Judge Dredd Annuals (1978- ) Comics Series, Judge Dredd Megazine (1990- ) Comics Series, Judge Dredd (1995) Live-Action Movie, Dredd (2012) Live-Action Movie, Judge Dredd: Dredd vs Death (2003) Video Game
19. Flash Gordon - Appearances: Flash Gordon (1934-2003) Comic Strips, Flash Gordon (2023- ) Comic Strip, Flash Gordon (1950-1951) Comics Series, Flash Gordon (1965-1967) Comics Series, Flash Gordon (1969-1979) Comics Series, Flash Gordon (1988) Comics Miniseries, Flash Gordon (1995) Comics Miniseries, Flash Gordon (2008-2010) Comics Series, Flash Gordon (2011-2015) Comics Series, Flash Gordon (2023- ) Comics Series, Flash Gordon (1936) Live-Action Movie, Flash Gordon's Trip to Mars (1938) Live-Action Movie, Flash Gordon Conquers the Universe (1940) Live-Action Movie, Flash Gordon (1954-1955) Live-Action Series, The New Adventures of Flash Gordon (1979-1982) Animated Series, Flash Gordon (1980) Live-Action Movie, Flash Gordon: The Greatest Adventure of All (1982) Animated Movie, Defenders of the Earth (1986-1987) Animated Series, Flash Gordon (1996-1997) Animated Series, Flash Gordon (2007-2008) Live-Action Series
20. The Great Saiyaman (Gohan) - Appearances: Dragon Ball Z (1989-1996) Anime, Dragon Ball Super (2015-2018) Anime, Dragon Ball GT (1996-1997) Anime, Dragon Ball Z: Wrath of the Dragon (1995) Animated Movie, Dragon Ball Super: Super Hero (2022) Animated Movie, Dragon Ball Z: Budokai 1,2 & 3 (2002,2003 & 2004) Video Games, Dragon Ball Z: Budokai Tenkaichi 1,2 & 3 (2005,2006 & 2007) Video Games, Dragon Ball Z: Kakarot (2020) Video Game
21. Kamen Rider - Appearances: Kamen Rider (1971-1973) Live-Action Series, Kamen Rider Black (1987-1988) Live-Action Series, Kamen Rider Kuuga (2000-2001) Live-Action Series, Kamen Rider Ryiuki (2002-2003) Live-Action Series, Kamen Rider Den-O (2007-2008) Live-Action Series, Kamen Rider W (2009-2010) Live-Action Series, Kamen Rider OOO (2010-2011) Live-Action Series, Kamen Rider Gaim (2013-2014) Live-Action Series, Kamen Rider Ex-Aid (2016-2017) Live-Action Series, Kamen Rider Build (2017-2018) Live-Action Series, Kamen Rider Geats (2022-2023) Live-Action Series, Kamen Rider: Super Climax Heroes (2012) Video Game, Kamen Rider: Battride War Genesis (2016) Video Game, Kamen Rider: Memory of Heroez (2020) Video Game, Shin Kamen Rider (2023) Live-Action Movie
22. The Shadow (Kent Allard/Lamont Cranston) - Appearances: Detective Story Hour (1930) Radio Broadcast, The Living Shadow (1931) Pulp Novel, The Shadow Radio Show (1937-1954) Radio Series, Shadow Comics (1940-1949) Comics Series, The Shadow (1973-1975) Comics Series, The Shadow: Blood and Judgement (1986) Comics Miniseries, The Shadow Strikes (1989-1992) Comics Series, Shadow Comics Series (2012- ) by Dynamite Entertainment, The Shadow Strikes (1937) Live-Action Movie, International Crime (1938) Live-Action Movie, Invisible Avenger (1958) Live-Action Movie, The Shadow (1994) Live-Action Movie
23. Astro Boy (Atom/Tobio Tenma) - Appearances: Mighty Atom (1952-1968) Manga, Pluto (2003-2009) Manga, Mighty Atom (1959-1960) Live-Action Series, Astro Boy (1963-1966) Anime, Astro Boy (1980-1981) Anime, Astro Boy: Tetsuwan Atom (2003-2004) Anime, Astro Boy (2009) Animated Movie, Pluto (2023) Anime

Best superheroes NOT FROM Marvel/DC day 24