http://en.wikipedia.org/wiki/List_of_X-Men_members

X-Men



Professor X Professor Charles Francis Xavier

X-Men, vol. 1 #42 (1968, backup story) (in flashback) Xavier founded the X-Men and was the original headmaster of the Xavier Institute for Higher Learning.

Deceased: Killed by Phoenix Force possessed Cyclops in Avengers Vs. X-Men #11.

Powers: World's most powerful telepath, capable of astral projection, mind control, illusion casting, memory manipulation, psychic blasts, and sensing the presence of nearby mutants.