hmm...
Maria from Symphony has always been hot to me. Especially as a playable character int eh saturn version. Hot, and could kick ass^^
Aya and Reiko from onechanbara: bikini zombie slayers for WII were also cool.
Alot of the Dead or alive girls are also very good looking. (honestly I spent most time plaing Ryu though.. XP)
Im sure there are many others, im a relativly simple guy XP.
Oh Almsot forgot Samus XD