I am building a couple decks every year well this is the time for planning

I'm looking for some ideas on a new deck. I am trying to eventually build a commander deck for every color combo. Right now i have \\\[\\\[muldrotha the gravetide\\\]\\\] \\\[\\\[rin and seri the inseparable\\\]\\\] \\\[\\\[cloud planet's champion\\\]\\\] \\\[\\\[auntie ool cursewretch\\\]\\\] \\\[\\\[giada font of hope\\\]\\\] \\\[\\\[most dangerous gamer\\\]\\\] and a \\\[\\\[prismatic bridge\\\]\\\] dinosaurs deck. I am trying to build 2 or 3 decks a year and tear apart as little as possible. I have built 2 decks this year cloud and most dangerous gamer and tore apart toxrill the corrosive for lack of fun for anyone. Well now I am planning on what I am building next year preferably a semi budget $100 to $250 deck and a more expensive deck probably around $300 to $700 but i have a bit of expensive cards in my bulk. My main deck right now is probably muldrotha and my favorite deck i have ever had was animar soul of elements morph or a kenrith the returned king deck that stole your stuff. I guess I could just build animar again but I would love any fun power 4 or below forever deck ideas.