Brock is #1, but Sid has to be up there. Both WCW and WWF wanted to push him to the moon on multiple occasions in the early and mid 90s, but he didn't give a fukk and always wanted spring season off to play softball.
Now that I think about it... Ultimate Warrior might be #1. I think Brock at least takes pride in his work as a performer. Warrior didn't even do that.