Centurion
Super Freak
Even if you don't like prometheous, you gotta admit a space jockey/engineer would make a cool figure. That's really the only prometheous figure I would buy, it would have to have the helmet on too and that way if you don't like prometheous you could always say its the space jockey (a cool bio mechanical-looking design)
That would be it.
The space jockey and his seat, but only for it's reference in the movie Alien.