Absolute 100% necessary games to play as a CSB fan to understand the inside jokes and references?

I've been watching some old CSB clips and I realized I have no idea what the heck Pat and Woolie are talking about most of the time when it comes to games or any other media. The Steam Sale is still on for a few days, so I figured I would try to get with the program. I have bought all the new Resident Evil games and finished them. I started with RE2,3,4 Remakes and left with RE4 being the best, RE2 at a close second, and RE3 being one of the worst nothing burger games I think I have ever played in recent memory. I then bought RE9 a few weeks after release, beat it about 15 hours, then played RE7 and RE8 this week and beat both. I think I am about 40% of the way to understanding Pat's RE mind goblins that he was talking about on CSB with how some of the hallways and tropes look similar or are otherwise ripped off from other RE games. I also saw some of Pat play Code Veronica X on a VOD on YouTube and he seems to HATE IT. I don't know what he thinks of Resident Evil Zero, Revelations, or Revelations 2, but I do think I I owe it to myself to play through the original RE2 and RE3. This is mostly because Nemesis looks far more interesting in OG RE3 than the remake.

Alot of memes are also from DMC, which being a Gamecube bro I never had the chance to play. I have the HD Collection and yes, I think I might skip DMC2.

I have never played a Final Fantasy game either. What else should I play now?