Lurchi When I was older and saw him in Hammer movies and such I was confused because he often played the good guy. Doctor Who even.
Two Jar Slave Peter Cushing, 1959's Hound of the Baskervilles. Not my favourite Holmes story, but quite possibly the best Holmes set to film. He strikes a wonderful balance between Rathbone's swuave and Brett's mania. Basically pitch-perfect. Check it if you haven't.