I'll second the OP's choice of My Hero Academia. It's easily my favorite current manga/anime series and does a great job examining and critiquing the superhero genre.
Otherwise, I'd list Power Rangers, Watchmen and The Umbrella Academy (I've only watched the show so far, but I plan to read the comics).
This also. I'm actually watching the original series now. I haven't seen many of the expanded mediums outside of the original anime, Crystal and the manga though (never seen any of the plays or musicals). But this franchise is still one of my favorites.