#1 Roman Reigns

Starting with the then Florida Championship Wrestling (FCW) all the way back in 2010, Roman Reigns has clawed his way through the ranks and reached the very pinnacle of WWE. He could've very well been the current Universal Champion had the coronavirus pandemic not thrown the entire world into disarray.
The Powerhouse of The Shield dominated WWE with his brothers Seth Rollins and Dean Ambrose in the early and mid-2010s before breaking out as a singles Superstar. He also won the Royal Rumble back in 2015 which eventually ended in an unsuccessful attempt for the WWE World Heavyweight Championship at WrestleMania 31.
Why are AEW fans upset at an actress? More HERE
The Big Dog would eventually go on to win every major title on the main roster of the company, becoming a Grand Slam Champion in the process. He is also only the second Superstar who holds the distinction of beating The Undertaker at WrestleMania.
Reigns has had his love-hate relationship with the WWE Universe but he is undoubtedly one of the greatest Superstars in the company's history.