Rob Van Dam

He was trained by the Original Sheik, Ed Farhat, who was one of pro-wrestling's classic and greatest bad guys. Even though their styles are quite different (Sheik being a wild hardcore-style brawler, known for throwing fire, cutting his opponent's forehead's up with foreign objects like a pencil, fork, etc. whereas Van Dam is a technical high-flyer), Farhat taught him the importance of the right mindset.