Michael Richards
The "Seinfeld" star was caught in the middle of a heated and race-fueled rant during a stand-up set. He was found guilty for angrily harassing a black man in the crowd, and that was the swift undoing of his career. He at least was incredibly remorseful, because he said he broke down in shame right after the performance.
Cosmo Kramer
Despite his faux pas, Kramer is one of "Seinfeld"'s most lovable characters. The often not-so-bright neighbor with a frequent agenda is a key member of the foursome, and his sense of humor is most relatable to fans. He even appeared in "Curb Your Enthusiasm" as a part of an in-show "Seinfeld" revival.
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