Assuming that these characters were real, the only ones I'd really find attractive would be Claire (CVX, DSC, ORC, and M3D only), Sherry (RE6), and Jill (Voth version only, none of those hooker-looking newer versions). Rebecca was kind of cute, I guess. Oh, and Alyssa from Outbreak, but only if she dropped the attitude.
Annette and Alexia from DSC weren't too bad-looking, either. Especially queen ant Alexia. Meow.
Ada always had this smug "I'm better than you" look about her, which I find incredibly unattractive. Jessica was even worse in this regard. Helena has this scowl-face thing going on, which isn't becoming; cheer up, girl! I find Excella to be quite fake, and thus a joke. Hunnigan and Sheva aren't my type. Ashley, ears; 'nuff said (but maybe if I was inebriated). Cindy was too ditzy, and Yoko was too androgynous.