Ole Burt really surprised me with his performances as Quint on Gunsmoke. He underplayed the role to perfection. No scenery chewing or anything. It would have been easy to succumb to the temptation of hollering "Stella!!" or smoldering, or emoting as an ACTORE but he played it about as straightforward as he could. My hat's off to him.
Compare the shows he made to the ones with Thad and Newly. His performances comes out pretty good by comparison.