Speaking of under appreciated mutants, let’s talk about Forget-Me-Not.
Out of all of the under appreciated X-Men, I feel like Forget-Me-Not has gotten probably the best treatment by writers. He actually has shown up as an important character in multiple series, and he has been pretty consistently written. He is just a nice dude who wishes people would remember him and appreciate him, but continues to do good even when people don’t cause he is genuinely a good guy.
He also has a pretty unique power- people literally can’t remember him. He is like the Silence in Doctor Who, the moment you look away, you forget he was ever there. Xavier had to literally set up a reminder in his own brain so that he would remember Forget-Me-Not existed and could say good morning to him (yah, I know, Xavier wasn’t an asshole for once. Small miracles.)
He has been instrumental in several major conflicts, yet nobody can remember him even being there.
It’s quite sad, really, but he manages to keep a sort of positive attitude. I especially like his design- it emphasizes the fact that he is a just a regular, ordinary guy.