#1. Will never - Cesaro
Cesaro is a freak athlete in every sense of the word. He's pound-for-pound the strongest man in WWE and he's undoubtedly among the most athletic as well. The Swiss Cyborg has everything going for him and seems to be set for his first singles run in 3 years after The Bar quietly split up.
Also read: 5 times Vince McMahon was forced to make a superstar World Champion
As we said, he has everything going for him - except the backing of Vince McMahon. McMahon likely respects Cesaro and his work ethic, but that's not the only thing that makes a world champion. The chairman of WWE has been openly critical of Cesaro, stating that he didn't have the charisma to be a top star.
In 2015, Cesaro seemed to have all the momentum in the world, with many believing that he was a legitimate potential World Champion. Whether we agree with it or not is irrelevant, because he isn't McMahon's World Champion nor will he ever be.