#1 Bobby Lashley
Bobby Lashley's WWE run could be described as nothing more than a flop.
Lashley was moved to the ECW brand and captured the ECW Championship at the 2006 ECW December to Dismember. His run would lead him into a feud with company chairman Vince McMahon, who would eventually capture the ECW Championship himself during a feud with the collegiate wrestling standout
He was moved to Raw and quickly scaled their ladder of success to land himself in a match with John Cena, which he would lose but still be treated as the 'Next Big Thing'; he received a respectful handshake from Cena after the bout. The following night on an episode of RAW, Lashley was injured during a match with Mr. Kennedy and was forced to take some time off to recover.
Little did we all know that this would be Bobby Lashley's final match in a WWE ring. He was released and just like that and his push to the top was gone in an instant.
He has since gone on to some success in TNA at least.