ENT: Commander Charles "Trip" Tucker; Shran the Andorian
TOS: Mr. Scotty "I canna do it, cap'n" Montgomery
TNG: Lt. Cmdr. "Fascinating" Data
DS9: I uh...haven't watched this one yet
VOY: B'elanna "She-Can-Beat-Me-Up-ANY-Day" Torres
Abramsverse: Like everyone else here, McCoy. Maybe Spock.