Columbo, Frazier, Lucy, several of the Soprano characters, JR Ewing, and, even though he is new, I'm starting to get a kick out of "Denny Crane."
Yes, I think "Denny Crane" is great. I've never been a Shatner fan, but he is great in this part. Spader is excellent as well. In fact, I think that BL is better than the much-vaunted DH.