2. Mark Henry
The World's Strongest Man has had a WWE career so full of ups and downs from a booking perspective that it is difficult to pick a place to begin. Debuting in WWE in 1996, fresh off an appearance in the Olympics, Henry was pushed as the next big thing. Unfortunately, he was an awful wrestler at that point and was completely exposed during his first match against Jerry Lawler. An injury would put him out of action and, save for an appearance or two in between, would not return to WWE programming in any sort of meaningful role until 1998. It was then that he joined the Nation of Domination and received something resembling a push. The muscle of the group, it was not uncommon to see him taking out stars like Triple H, X-Pac and Ken Shamrock at the Great One's orders. A side program with Chyna showed his knack for entertaining and his transformation into the Sexual Chocolate character gave him even more exposure on WWE television. Weight troubles and more injuries led to him being removed from television and dumped in Ohio Valley Wrestling, WWE's developmental territory. Returns in 2003 and 2005 were also adversely affected by injuries, as well as bad booking. Each time, Henry was brought back to television as a monstrous, unstoppable heel but rather than beating top stars and becoming established as a main event star in the eyes of the fans, he dropped matches to the likes of Booker T, Kurt Angle and Undertaker and struggled to gain traction in the spot management had hoped he would succeed in as a result. Losing those matches meant fans would not take him seriously as a main event threat. That would continue to be a common occurrence in Henry's career. No matter how many times her started off as a beast of a competitor, repeated losses hurt his credibility. In 2011, he finally broke through the glass ceiling and was given a run with the World Heavyweight Championship. He defeated Randy Orton, a completely unselfish worker whose history indicates his willingness to put others over for the betterment of the company, and became the unquestioned top heel on SmackDown. What could have been a lengthy run that was used to put over a young star, such as Daniel Bryan, was ended unceremoniously at the hands of The Big Show. Again, Henry fell back down the card and was used in a meaningless tag match at WrestleMania. When he returned in 2013, true to form, he was booked as an unstoppable monster. He defeated Ryback at WrestleMania and was involved in one of the greatest angles in WWE when he announced his retirement, only to turn on John Cena. That led to a match at Money in the Bank that he lost, killing all the momentum he had up to that point. Since then, he has shaved his head, become a babyface and served as little more than an enhancement talent, his name and reputation used to help get younger stars over. Not a bad thing but not necessarily a desirable position for a former heavyweight champion like Henry. Especially when he only has so many years left before he retires. For real.