I like to have David and Shaw in space suit. And, with the same male body, they could make a Holloway too
Proto Xeno from the final scene of course
Sacrificial Engineer... too little time on screen and not as much cool as the others (it's just a naked man, after all)
Maybe Vickers and the Captian, they are important characters to the movie, but since NECA doesnt like to make human figures, it's just a "maybe"