Leonard Nimoy (March 26, 1931)

Above all, the multi-talented Leonard Nimoy gave the Priestly Blessing (fingers in a V) to Star Trek. Did he also propose that Spock say Live Long and Prosper? Did he help invent the memorable character from another planet who was very intelligent, perfectly saw how earthlings were irrational, but never quite felt at home or nativized? You get my point.