Some great choices here. Honestly, I can't even begin to list mine. There are so many. But I think I'd skew more to old Hollywood. Vivien Leigh in Gone with the Wind, Jean Simmons in Guys and Dolls, Audrey Hepburn in Roman Holiday, Barbara Stanwyck in Double Indemnity, Katharine Hepburn in Bringing Up Baby, Grace Kelly in Rear Window, Julie Christie in Far From the Madding Crowd, Joan Crawford in Mildred Pierce, etc, etc. I'd also have Deborah Kerr for The Innocents. :)