This is a tough one! But I will take Ms. Rogers because I have become such a fan of her this past year!
Each of the six would bring something special to the role, but I agree with 30somethingdeb. My choice is Ginger Rogers for her beauty, her spirit and Santa will always have the best partner for the Christmas Waltz.
Ginger is my vote too even though I am late, I am such a fan of her and Fred Astaire, and I wish they had done more movies together.