#4 John Morrison
John Morrison, also known as Johnny Mundo, seemed to be on a fast track towards the WWE Championship back in early 2011. As a babyface, he'd started to pick up some serious momentum on Monday Night Raw, even taking part in a match for the WWE Title against his former tag team partner The Miz. Isn't it funny how things work out?
Unfortunately, Morrison reportedly gave Trish Stratus the cold shoulder following their WrestleMania 27 match; and from that point on, he'd pretty much signed his own death warrant. To this day, Mundo has yet to return to the company, and WWE has missed out on a lot of potentially great feuds with Mundo instead becoming a massive star in Lucha Underground.
We conclude with one of the best in the business.