Gambit because he can either be the villain or the hero and for being in the hierarchy of the Thieves Guild as well as being in the X-MEN he has earned the respect from both sides.
Someone's been watching The Avengers... Me thinks.
Hero: I'll go with spider-man. He's a freelance photographer, he's in love with the girl next door, & he's an acrobat that can shoot webs out of his wrists!
Villain: Cat Women, because she's purfect. Not the Halle Berry one though.
Joker is too mainstream.