#3 The Miz
As well liked as the Miz is today, before 2016, he was nothing more than a mid-card player. As much as the Miz wants to boast about being able to main event WrestleMania 27, his performance at the event was abysmal.
At that time, John Cena was the only main event talent about. His star power and awe-inspiring presence left no room at the top for anyone else and when the Miz was given a chance to share the limelight, the gulf in class between him and Cena was glaringly apparent.
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The Miz was stuck between a Rock (The Rock) and a hard place (John Cena), and it did nothing for him. At that time, the Miz was just an annoying unlikable heel, now he's a seasoned veteran that understands the art of receiving heat.
At WrestleMania 27, the Miz was a mid-card talent dropped in way over his head and he nearly never recovered.