I would have said Iceman, but that dude was so bloody cheese in the Marvel vs Capcom series, it's hard to forgive him in spite of being awesome.
Cable is clearly awesome but to my knowledge never actually joined the X-Men official. He teamed up with them, led spin-off teams and such, but was never actually an X-Man.
Wolverine... meh. Yeah, there's some neat stuff going on around him, but he's basically just Connor McCloud without the "holy warrior/tournament" mythos. An immortal dude who hasn't quite gotten sick of living yet (like Apocalypse).
I always liked Bishop, or at least Bishop's powers... and, like Cable, I love a good time travel story.
As far as outright "best": Mimick. He is literally all of the X-Men combined.
Cable is clearly awesome but to my knowledge never actually joined the X-Men official. He teamed up with them, led spin-off teams and such, but was never actually an X-Man.
Wolverine... meh. Yeah, there's some neat stuff going on around him, but he's basically just Connor McCloud without the "holy warrior/tournament" mythos. An immortal dude who hasn't quite gotten sick of living yet (like Apocalypse).
I always liked Bishop, or at least Bishop's powers... and, like Cable, I love a good time travel story.
As far as outright "best": Mimick. He is literally all of the X-Men combined.