As great as Mitchum was, the only actor who ever literally freaked me out was Dennis Hopper in “Blue Velvet”.
“A Candy Colored Clown They Call the Sandman”
I thought he was freaky but not necessarily scary. Of course, I wasn’t a kid when I saw it either.
Channel 9 in LA used to have a movie ever night. The Million Dollar movie. late 50s early 60s. They played the same movie every night, I think 7-9, Mon-Fri. I must have watched the Al Jolson story 15-20 times. Used to do a great impression.