The word credibility immediately comes to mind, which goes beyond even Harley as a worker or a gimmick. Harley Race gave a legendary credibility to professional wrestling, not just as the premier World Champion of a generation but also as an aging midcarder and manager. He made Brisco, Funk, Dusty, and Flair household names by passing the torch and had no problem passing the belt to Baba and Rich. It's easy to say he was too giving as a champion without recognizing how perfectly he did he job. In falling hard on his ass every night and losing the title at every turn he cemented a dynasty. My favorite will always be that barn-burner with Terry Funk from the Houston footage. Or the hour draw with Lawler. Or the Hogan stuff. Or even just him intimidating with a briefcase full of cash and putting the hit out on Flair. Absolute legend.