George Lucas may have been the '70s filmmaker who made Harrison Ford a star, but it was his buddy Francis Ford Coppola who first tapped the actor’s grumpy potential. After Ford broke out as a wise-talking street racer in Lucas’ American Graffiti, Coppola used him as a bitter/creepy businessman in his '70s paranoia classic, The Conversation. Few actors have ever been so unnerving through sheer grumpiness as Ford managed here in a small role. His future clearly wasn’t in playing villains, but Coppola proved that Ford had a knack for intimidation and seriousness.