Denise Duff is one of the all-time great female vampires, in my opinion. She starred as the main female vamp in the Subspecies movies. She always seemed to know how to be both seductive and powerful at the same time, which is exactly what a good female vamp needs to be. :)
Here's a link to a great video on YouTube featuring Ms. Duff as a vamp:
This video was posted by cassinhodorock2, who has an incredible channel on YouTube. Definitely check it out.