You all listed a BUNCH of my favorites, but I have a few more to add:
House of Cards. I LOVE Robin Wright's wardrobe. And the show is brilliant.
Dark Shadows (the recent Johnny Depp film) had some glorious 70's looks. I especially adored Eva Green's wardrobe.
Valmont The gowns are exquisite, and I would wear anything Colin Firth wore in this film. LE SIGH.
The Notorious Bettie Page. PIn-up Retro gorgeousness.
Mad Men. I loved the early seasons, but the later seasons' styles are still so satisfying to look at. It is so interesting to see how they dress curvy Joan Holloway as the show moves into the Twiggy era.
Vertigo Kim Novak's white coat, black dress and black gloves are to DIE for.
The Sound of Music - I watched this at Christmas, and now, having read Lisa Pippus' blogs: Colourmuse, and Style is a Language - I was astounded to see that every woman in the film - even the blurry extras dancing in the background - are all dressed in colors that showcased every single woman's individual beauty. Everyone glows in the film. But Eleanor Parker's wardrobe really takes the cake. She is just stunning. I wanted to be the Baroness when I was little. I kind of still do!
Batman - I was absolutely obsessed with Kim Basinger's wardrobe in the 1989(?) film. I even had a turquoise dress and pale pink belt like hers.