17. Brock Lesnar
You definitely don’t want to be over the shoulders of this guy. The youngest WWE Heavyweight Champion at one point, audiences everywhere were ready for great things from this fighter. Switching over to MMA and then on to UFC after that, Lesnar was out of the ring altogether due to health issues. After 8 years away from WWE, Lesnar returned in 2012 as a huge media sensation. He will always be considered one of the best wrestlers of all time.