#1. AJ Styles (IMPACT Wrestling and WWE)

In the last decade, WWE star AJ Styles has competed in almost every major wrestling promotion. He in-ring skills are incredible, and he's called "The Phenomenal One" for a reason.
AJ Styles started the decade in TNA (i.e. IMPACT Wrestling), where he was the TNA Champion. He had amazing matches against the likes of Christopher Daniels, Kurt Angle, and Matt Hardy. Then, AJ Styles went to NJPW, and he reached a new level with the Bullet Club.
R-Truth wanted to 'kill' former WWE writer. More details HERE
Styles made his WWE debut at the Royal Rumble in 2016. He quickly became "The Face That Runs The Place." Styles is a two-time WWE Champion, and it's fair to say that he's been the company's MVP. He has delivered some great matches against John Cena, Dean Ambrose and Finn Balor.
Styles always elevates the company he works for. He continues to add to his impressive career, as his Boneyard Match at WWE WrestleMania will go down in history. "The Phenomenal One" excels at every aspect of wrestling, so he's arguably the greatest competitor of the decade.