#4. Wade Barrett
Wade Barrett was cast as the leader of the Nexus stable. It was an understandable enough move, as he was one of the best talkers of the group, a good worker, and had the size WWE typically desires in its top stars.
Out of the group, he was the one to get the most singles opportunities, including PPV matches with John Cena and even challenging Randy Orton for a world title at Survivor Series 2010.
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Barrett would hang around WWE for quite some time, including two significant character reinventions as a bare-knuckle brawler, and then as Bad News Barrett. He would get his pushes, including capturing the Intercontinental Championship and winning a King of the Ring tournament. A combination of poorly timed injuries and uneven bookings saw him stall out, though. In the end, he finished his WWE tenure working as part of the lukewarm League of Nations stable.
It's a shame because there were rumours that he was supposed to be the man to end The Undertaker's streak at WrestleMania 27 back in 2011.
Since leaving the company he surfaced for What Culture Pro Wrestling (more recently renamed Defiant Wrestling) as a commentator and authority figure.