#3 Daniel Bryan
The rumor mill has reported that the backstage staff may move AJ Styles to the Blue brand after WrestleMania 36. Now, if he moves to SmackDown, WWE can book him in significant rivalries. He had a fantastic run on SmackDown after the initial draft as he picked up the WWE Championship twice.
Styles feuded with Samoa Joe, Shinsuke Nakamura, Jinder Mahal, Kevin Owens, Shane McMahon, Dean Ambrose, and even Daniel Bryan during his run. However, it is worth noting that when Styles clashed with Bryan, the two Superstars portrayed different characters than what they are doing now.
The Phenomenal One acted as a face while Bryan had newly embraced his dark side. Now, Styles is high on momentum as a heel, and the WrestleMania XXX main event winner has won the hearts of the fans with his feud against The Fiend Bray Wyatt. Recently, he has united forces with Drew Gulak, and he will challenge for the Intercontinental Championship at WrestleMania 36.
Bryan is the favorite to win that title, and since it is the only singles championship that has alluded Styles so far, WWE could kick-start a new rivalry between the two in-ring veterans.