Jean
Cyke
Logan, but don’t make him the sole focus of the movie
Storm
Kurt
Xavier I guess, but as a headmaster and not a field team member.
Hank
Quicksilver, but Quicksilver the asshole, not Quicksilver the whatever Fox has going on.
Gambit I want, but he’s not a great first X-Man. Same with X-23, and to a lesser extent Rogue. It would be really cool to do the Ms. Marvel storyline with her.