#4 AJ Styles

While AJ Styles made a few sporadic appearances in WWE, he was best known for his work outside WWE, where many considered him the best wrestler who’d never worked with WWE.
In late 2015, news started to spill out that Styles, along with a few others, had signed with WWE, however, the company tried to keep things under the radar.
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A blow-away deal pulled Styles to WWE for the first time in his career for a long-term contract, and he made a big surprise appearance in January 2016 at the Royal Rumble pay-per-view. He entered the Royal Rumble match at No. 3 and surprised the entire WWE Universe, including Roman Reigns, who was competing in the match at the time.
Styles has taken WWE by storm ever since
Styles went on to last almost 30 minutes in the match and had a great debut for WWE before being eliminated by Kevin Owens.
He has since become one of the biggest WWE Superstars in action today, and will likely go down in history as one of the top-ten wrestlers of all time.