I like:
Well, Snape is my favorite but since you're excluding him:
-McGonagall. She just kicks butt and knows how to run a class.
-Quirrell. Because he is, or at least acts, so cute in a pathetic way. Sure, he WAS working for Voldy, but you've got to feel bad for anyone being the host for a parasite like that.

Plus, he was in my dream last night for some unknown reason...
-Trelawney. I've always loved her. I love what she does in DH too, but I won't give it away in case people are still reading...

Forgot to mention my least favorite...I hate Umbridge. Naturally.

Most utterly contemptible, unpitiable character in the books, IMO.
And Lockhart...well, he's good looking (especially manifested as Kenneth Branagh) but oh-so-annoying and useless.
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*~Proud Pegasister/brony~*