#2 AJ Styles

AJ Styles has only been in WWE for a few years, but if you look at his achievements, you'd think he's been there forever. He's a two time WWE Champion and a three-time United States Champion. His second reign as WWE Champion was 371 days long, and he's put on so many classic matches.
What hasn't AJ Styles accomplished? A whole lot to be honest. Winning the Royal Rumble is one of those things the Phenomenal One hasn't done. It's hard to say if he will get to accomplish that though. He probably won't win this year, and he might not win it ever.
Right now Styles is feuding with Randy Orton. The duo had a match at WrestleMania last year, and it was pretty great. Right now I don't think anyone can say with any certainty that Orton and Styles will have a WrestleMania rematch, but it seems possible.
Even if they were to make amends before WrestleMania rolls around, both WWE Champion Brock Lesnar and Styles are heels, and it seems unlikely that WWE would go for a heel vs heel match-up as one one of its big-money matches at its biggest show of the year.
Did a WWE Hall of Famer predict John Cena's heelish ways long ago? More details HERE.