It's interesting how popular culture infiltrates the mind. I definitely recognize Ben Gazzara's name, and his visage came to me instantly as I read the thread title. Yet when I look at his filmography at IMDB, I have not seen him in a single role. In fact, I've never heard of a vast majority of the films on the list.
Is it appearances on Carson, perhaps? All I know is that I know who this guy is, but I've never watched him in a movie or TV show.