Here are some that I can think of:
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Michael Richards- used the n-word multiple times in response to black hecklers during a stand-up performance.
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Roseanne Barr- said Valerie Jarrett, who is partially black, looked like a Planet of the Apes character.
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Gina Carano- compared Joe Biden's policies as President to the Holocaust.
Even then, Carano will be working for The Daily Wire and Barr was doing a stand-up tour prior to the coronavirus pandemic. Also, Richards has made or still does make a lot of money off of Seinfeld and probably could have had a career like Jason Alexander (making the rounds as a television guest star), if he wanted.
He had a stand up special (self-released) and has been doing shows. He also has the rights to his unreleased movie.
If you're powerful enough "cancelling" doesn't really mean much and I wouldn't be shocked if some network picks up his work at some point in the future.
His unreleased movie about dating a teenager or something?
Hope he keeps it that way.
If Louis C.K. was in a movie or television show, most people would not be bothered. There may be some outcry, but it wouldn't go anywhere. It's just that no studio or network wants to be the first one to hire him, if he even wants to.