Who are the actors/actresses (whether a legit A-list star or rising star) who was confirmed to have been blacklisted

Do any names come to mind? Are there any stars who have come out and acknowledged they were blacklisted because of this or that? Because of something they did or some grudge from a producer in a higher position who tried to kill their career? Who do you feel has been blacklisted in Hollywood? Any actors or actresses who looked to have been on their way to becoming a bigger star and simply dropped off?

https://www.reddit.com/r/movies/comments/nlecgu/who_are_the_actorsactresses_whether_a_legit_alist/