Definitely Gambit and Shatterstar. Both are intimidating, high-potential, historically dramatic , and often talked about in a positive light of anticipation. Everyone has their own fun suspicions of 'Star and Gambit simply draws a crowd no matter where he shows up.
If he were depicted as a villain for an extended period of time, for example, a large portion of the present X Factor comics, or some distant miniseries, or a cartoon series. In any case, it would be very interesting to just see him have some external display of the internal conflict which has been conveyed so often in his little thought boxes. It sounds very true to his character, not being quite so black and white about the inhabitants of Earth and his sense of righteousness, among other things.
Doctor Doom100% You must be an evil bitch! We've matched you with Dr. Doom. You're cold, ruthless and out for yourself. Well you two may burn in hell together, but you'll have a good time getting there.
The Doctor The Doctor will show you a time you'll never forget or one you read about in your history book. Action and adventure awaits. Just be prepared in case he regenerates halfway through your date and takes on another image.
Doctor Strange A man of mysticism, Doctor Strange has access to a lot of books. He can also levitate and take you around the astral plane. He may seem stuffy but he will be there for you when you most need him.