Sting (1985-2016)
Sting did not move to WWE until later on in his career. Before that, he was a WCW mainstay even after his colleagues already jumped ship. He fought Cactus Jack, Jake Roberts, Rick Rude, Flair, and Vader to forge a path of his own. He enjoyed his Crow rip-off alter ego and became an icon in his own right.
Andre the Giant (1966-1993)
You do not even need to watch wrestling to be familiar with Andre the Giant. Called “The Eighth Wonder of the World,” he was undefeated for 15 years! It was not until Wrestlemania III that he met defeat at the hands of Hulk Hogan, who bodyslammed and leg dropped him into submission. Aside from that, he played Fezzick in The Princess Bride. It was truly tragic when he died in 1993.