
30. Bill Belichick
Belichick is the most successful coach in NFL history, but that doesn’t mean people like him. In the beginning, he won respect because he brought the Patriots to the top and maintained dominance.

But Belichick is also a notorious cheater. He infamously videotaped the Jets’ practice facility to film their defensive signals. Belichick puts winning above anything else no matter the cost. Spygate was a stain on the sport (via SBJ).