#5 Kane

We all know him as The Big Red Machine but Kane had a very different character before he became the Devil's Favorite Demon. Before he became the monster we know today, Kane played a shocking Isaac Yankem dental gimmick as can be seen in the picture above.
Needless to say, this was not a very popular or a successful character and the WWE soon looked to use Kane in a different way. He would then go on to play a poor copy of Kevin Nash before the WWE decided to give the man a role which he could really thrive in. That role would be the role of The Undertaker's brother.
Cody Rhodes' uncle is a WWE Hall of Famer. More details HERE.
Kane has seen massive popularity and success in this character and remains one of the most feared superstars to ever walk into a WWE ring.