F Scott Fitzgerald. People buy his class envy whining without even thinking that he was rich at one time. Wiped out in the Crash of 29. I don’t know if he heard these warnings directly but Charlie Chaplin was telling everybody he knew to get the heck out of the market just before the crash.
Sylvia Plath. She did do us one service. Any woman who quotes Plath or frequently mentions her is a person to be avoided at all costs.
Hemingway. Both as a person and an author.