As a kid, it was the villian(ess?) in the Disney animated movie
The Rescuers, the one with the mice.
Googling revealed her name to be 'Madame Medusa' - that rings a bell now. She hooned around in a big red cadillac, carried a shotgun, and kidnapped children! Bloody freaky at that age!
Good pick by Jake on the murderous uncle from the Lion King (voiced by Jeremy Irons, I think). Alan Rickman's Sherrif of Nottingham was equally evil.
But it seems that the older I get, the less impressed I am with 'villains' ... people 's just aren't black and white anymore. It's like Christine's song.. "Villains are Hard to Find"!