#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.
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.