Cyclops

Forced to parachute out of a damaged plane, parachute caught fire;
Powers manifested for the first time; slow his descent
Suffered a head injury upon landing, lost the ability to turn off his optic blast
Wears glasses or a visor made out of ruby quartz, only thing that absorbs his blasts
First student at the Xavier School, also the first X-Man, became team leader
Formed X-Factor, with the original X-Men, eventually rejoined the X-Men
Protects vulnerable mutants as they integrate into the human world