Anybody remember Joe? He got an Oscar nomination for that. Not a very good film, but he was wonderful. (It was also a very early film for Susan Sarandon.)
Here's a tip - you can catch a very early glimpse of Peter Boyle in Diary of a Mad Housewife with Carrie Snodgrass, Frank Langella and Richard Benjamin. He's one of the patients in the final group therapy scene.
His best performance (besides Frank Barone)? Tail Gunner Joe as Joe McCarthy. Brilliant. (That's him. The film was...a little one-sided, although it was the side I was on.)