Personally, I think that necromancy is more "resourceful" than "evil". I mean, you have that near perfect, well oiled machinery that's the human body and you'd leave it lying there just because it has no soul? You would build up mana when you can substitute plain life force for it, which comes in pretty much limitless amounts? What a waste!
However all the OTHER necromancers in DD pretty much fit the "creepy guy who has zombieface".
Also: