#4 Brock Lesnar
If Lesnar hadn't returned to shock everyone at Money in the Bank, then he wouldn't be among the heels on this list. But since his mere visage can be seen as a slap in the face to some fans and full-time performers, he has to be on this list.
I wish he was gone and letting the deep roster have their chances to shine. But he's here (for now) and will be until he either fails in his cash in or captures another title to show off.
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He was already a polarizing performer before even returning to the WWE and since he won MITB, fans have another reason to shoot daggers with their eyes in his general direction. His dancing with the boom box was a rare funny moment and showed that he wasn't just a 'jump-in-place' destroyer.
Heels and faces come in all shapes and sizes, and whether you like him or hate him, Lesnar plays the arrogant jock heel extremely well. There needs to be a fine line walked with Lesnar this time around, however, because having him win another major title will likely get some fans to hate him - and not in a good way.