Let's see... My gut says I should disagree.

I don't see him as a fit for any of the bad guys. He's not burly enough to be Wolverine, or Cyclops, or Beast. Too outgoing to be Xavier. I would have guessed Nightstalker, based on the fact that he's the only memorable male mutant that's more wiry than huge. Given that I don't remember anything about Ice-man that his name doesn't give away, I'm gonna say that role is too minor for an actor of his caliber.