Charles Xavier is the man that brings it all together. Without his vision, then there wouldn’t be any drama or action as it sought out to live happily among humans. His vision attracted many others as did his natural ability to help others.
Iceman was one of the original five X-Men, and before Wolverine and Gambit could join, Iceman was the defiant one. His powers are pretty obvious considering his nickname as he can lower his body temperature to negative one hundred and five degrees Fahrenheit.