07. Sigourney Weaver

Looking back at the Alien quadrilogy, it's tough to say if Sigourney Weaver made Ellen Ripley or if Ripley made Weaver, but the role has achieved such a lofty status that we just couldn't imagine anyone else splattering facehuggers and chestbursters across the insides of a spacecraft. Weaver isn't a particularly striking specimen of physical prowess, and considering she spends most of her time in a flightsuit or covered in slime, her sexual allure is not what's on display here either, but that's precisely what makes her so incredible. Cyborgs, marines, and a colony of space criminals all failed to eliminate the alien threat, so who we gonna call? Ellen freaking Ripley.

06. Grace Jones

She may not have as extensive a filmography as some of her colleagues on this list, but in the mid-80's, Grace Jones personified that powerful, raw intensity we suspect lurks within the fairer sex. Though she had already established her androgenous persona via a singing career, heads really turned when this muscular, flat-topped model fought side by side with Arnold Schwarzenegger and Wilt Chamberlain in Conan the Destroyer. In fact, she was so convincing as she helped "The Governator" dispatch an evil sorcerer that studio execs decided to cast her in A View to a Kill as a Bond villain... with superhuman strength. 'Nuff said.