Hulk Hogan
Ric Flair
Undertaker
Steve Austin
I think The Rock is getting plenty mentions but for his celebrity rise outside of the ring. His career in wrestling, while he was popular and good, never reached the heights of others.
Macho Man, Sting, Roddy Piper, HBK, Andre the Giant, Ultimate Warrior, Bret Hart, and some others need a hard look as well.