Alan Rickman in Robin Hood - bad, but screamingly funny! Not slick, but vain and with really good personality flaws! A real all-rounder!
On threatening to cut Robin's heart out with a spoon,
Guy of Gisbourne: But why a spoon cousin? Why not a knife or a...
Sheriff of Notts: Because it's dull you twit, it'll hurt more!
Brilliant!
Also in the vein of being bad and funny (although this is a bit sad) loved Hades in Disney's Hercules...James WooRAB as a bad-guy doing stand-up! Made me laugh anyway!