Bakugou as a pro-hero speaking out against bullying is my kryptonite.
There's this one fic on Ao3 (will I ever be more than I've always been?) that is about exactly that. It details Bakugo having an epiphany about what kind of hero he really wants to be, him apologizing to Midoriya, having talks at schools about bullying and telling his middle school principal that he should've been expelled for his actions.
It's part of a series of other fics detailing Class 1-A's life as pro-hero's and they're all pretty cool.
So go read, if you're interested!