Besides Scar, I would say my favorite Disney villian would be Shere Khan. Maleficent would come at a close third. The reason I LOVE Shere Khan is because he's similiar to Scar as they both have British-accented voices and act very elegant. However, Scar has got nothing on Shere Khan when it's "come to brutal strength". Another reason why I like Shere Khan is because I just love his voice actors: the late George Sanders and the late Tony Jay.
I even recall watching the Jungle Book movies just to watch all the Shere Khan scenes. He is just so cool to me, even though there's so little of him in the movies. Finally, I may agree with the Nostalgia Critic that he is what Scar should have been.