#3 Kevin Owens

Kevin Owens made his main roster debut in the WWE since the middle of 2015 and earned a lot of gold along the way. Owens has become the WWE United States Champion three times, the WWE Intercontinental Champion twice, and was the second ever WWE Universal Champion.
It makes perfect sense that the crafty Owens could add Royal Rumble Winner and WrestleMania main eventer to his resume in 2018. Now that he has the help of his "guardian angel" Sami Zayn, a man who cost him the Rumble in 2016, he could win the match if the cards fell right.
Cody Rhodes' uncle is a WWE Hall of Famer. More details HERE.
If AJ Styles retains the WWE Championship, a reprise of the feud with Kevin Owens is definitely a WrestleMania-worthy feud and worthy match as well. Owens has a lot of enemies on the SmackDown Live roster though, and that could work against him.