Source: blogspot.com
2. Cyclops
AKA Eric the Red AKA Phoenix AKA Slym Dayspring AKA Scott Summers
Joined: X-Men (1963) # 1
I love Cyclops. No one loves Cyclops but I do. He's a fantastic character who has grown but not changed his essential aspects over the course of 50 years. Scott Summers was struck by tradgedy when his parents were abducted by aliens and he and his brother Alex (more on him later) were thrown from the plane wearing the same parachute.
Upon landing, Scott smacked his head so hard it caused perminant brain damage and awakened his mutant powers. That's right, you know how Cyclops can't control his eye-beams? That's not part of his power, it's because he damaged his brain. That's kinda funny.
He eventually met Professor Xavier,who gave him Ruby-Quartz glasses that could block his beams and he became the first student of the Xavier School and the first X-Man. He alternately served on and lead the team for decades, met and married his sweetheart Jean Grey (after ditching his first wife like an a-hole) and became one of the Marvel Universe's big dogs. And then he fought the Avengers, got possessed by the Phoenix, and barbequed Professor X. A little while after that, he tried to fight the Inhumans and wound up getting gassed to death.

