For my money, Mike McGlone who’s been seen mostly in Geico commercials lately, is probably channeling (among others perhaps) Robert Stack.
I also love Don Cheadle. But I propose an alternative: Elijah Kelley, who was astonishing as Seaweed in the 2007 version of Hairspray. http://www.youtube.com/watch?v=BhMGzGd4sr0 Bad-quality fan-shot video, but the kid is dynamic.
NOBODY can play Mitchum. He’s too one-of-a-kind
Steve Buscemi as Don Knotts.
I thought he was channeling Eddie Munster