#3 Rezar (Authors of Pain)

One half of the Authors Of Pain, Rezar also has an MMA background. Since his debut on the main roster, he failed to impress the fans, thanks to the WWE's bad booking.
During their NXT days, the team was managed by Paul Ellering, and many expected that they would become one of the best tag teams of this era. But again the WWE ruined everything by booking them in a meaningless feud on Raw.
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At least he has a considerable record in Mixed Martial Arts. He has a record of 6-2 in MMA and his last match happened in 2014. He also has a big body that allows him to look like a threat to his opponent but it will be better if the company books him against big superstars.
Rezar hasn't shown his toughness in the ring so far, but we could see that too in the future.