9. Rey Mysterio

Rey Mysterio is one of the most popular wrestlers out there, and that is thanks to his uncle, Rey Misterio. He started his career in Mexico where he learned the Lucha Libre style and adopted the high flying style that would eventually become his trademark. He has won several championships and his career has spanned three decades so far. Part of his persona is, obviously, the mystery surrounding his identity, hence the name. However, he has been caught on camera a couple times and he has even wrestled unmasked a few times in WWE tournaments.