for me, there's only one answer to this question: Joanne!
"Inside every actor there is a Tiger, a Pig, an Ass, and a Nightingale. You never know which one is going to show up."
-John Michael Higgins in FOR YOUR CONSIDERATION
I love Amy, but there's something about Joanne's dryness that is so wonderful.
"You never really understand a person until you consider things from his point of view - until you climb into his skin and walk around in it."
To Kill A Mockingbird