Montgomery ‘Scotty’ Scott – James Doohan
This Canadian actor inspired a ton of fans to pursue careers in engineering and other technical fields, and all because of his character. Doohan didn’t have a lot of success in finding other roles after Star Trek; he often returned to play the character in the animated and film continuations, and also made frequent appearances at conventions.
Commander Willard Decker – Stephen Collins
Some of us may recognize him as Eric Camden from the television series 7th Heaven but he’s also a Trekkie. Since then he has starred in many films and television shows, and is also a published author.