What's your best example of a major film or TV star who's career totally tanked?
I don't mean where the person did a Francis Farmer/Margot Kidder routine and tanked their own career....
Just those former "A list" actors who stayed in "the business".... albeit in humiliating and embarrassing ways.....
My personal nominee for this dubious distinction is Robert Vaughn.....
Napoleon Solo, of The Man From U.N.C.L.E fame.....
Suave, cool, debonair....

Star of a smash hit, and an iconic show....Watched by millions of people every week....
I saw him about three years ago on TV doing an infomercial for The Helsinki Formula, a topical "hair growth" product....(Gee, I hope Bob's check cleared before this bunch had to clear out the bank account and split town to set up their next scam...)
I really felt bad for Robert Vaughn.... that's worse than Hollywood Squares.....
Any other nominees?