Would have to be;
Ken - Just awesomeness all the time.
Chun-Li - Quick, lotsa poke moves as stated before - and i love her supers - especially the QCF, QCF+K one. XD
Akuma/Sakura - as my back up!
And when i'm feeling cheap, i bring on the Shotokan boys;
Ken, Ryu, Akuma. A-hyuk.