It wasn't a choice but I'd vote for Inspector Henderson as portrayed by former comedian turned dramatic actor Richard Belzar.

The relationship between Henderson and Lois was just perfectly played. You were able to sense that beneath the verbal sparring there existed a mutual respect for the abilities of the other.

Tank (who wonders if his stint on L&C had anything to do with Belzar getting his role as Det. Moench on Law and Order, or whatever cop drama it was he was/is on)