I'd have to say that although I liked Reynolds a lot, I thought the pilot (can't remember his name at the moment) was by far my favorite in the series & movie. maybe I just have a thing for comic relief characters.
Here's a couple more:
Teal'c in SG1: The complete deadpan delivery at all times just cracks me up. Especially in the episode where SG1 gets their minds controlled by the exploeatory computer device/program and he chugs a pot of hot coffee. I laughed out loud and rewound to watch it again!