Helen Mirren, Julie Christie, Raquel Welch (who, IMNSHO, is hotter today than she was 30 years ago). Others?
Not so hot -- Jane Fonda and Goldie Hawn, both of whom failed to learn the lesson taught so well by Sally Field (who I wouldn't call "hot" but, damn, she's as cute today as she was as Gidget) that it's better to grow old naturally and gracefully and lay off the collagen and other "work".