One that really sticks out for me is "Cool Hand Luke." I still remember working at my dad's dry cleaners on Saturdays, and the radio would be going all day. I'd hear the commercial for that film would come on with the phrase "What we have here is a failure to communicate." I have the actor's face in my head, but don't know his name. I am sure SC does though.
Strother Martin.
If I rated some of his movies as MUST SEES, I'd include "Cool Hand Luke" with "The Hustler" (possibly one of the greatest dramatic characerizations ever), "Cat on a Hot Tin Roof" with Elizabeth Taylor as his unloved wife - a truly WONDERFUL movie about a dysfunctional family and of redemption, "Hud" (Newman played a fairly despicable charatcer but you felt for him) and "The Verdict" (a lawyer past his prime gets a case that could restore his life).
I have the actor's face in my head, but don't know his name. I am sure SC does though. 