Piotr Rasputin, whose mutant name is Colossus, is a longtime favorite amongst X-Men fans. Having joined the team in Giant-Size X-Men #1 (the same issue that introduced Wolverine, Storm, and Nightcrawler) in 1975, Colossus has supported the X-Men through some of their biggest stories throughout the years and continues to be a major asset to the team. Colossus is one of the more high-profile members of the X-Men, having appeared in several of the live-action films, including a major role in Deadpo...