Poll Position: Greatest Alien Race In Fiction

Ok, this week on poll position we're going to try and answer a question of truly cosmic proportions. Which alien race is the greatest in all of fiction. And when we are talking fiction I mean, all of it. The candidates can come from visual media (so TV (both live action and animation) and Film), Audio (radio shows such as A Hitchhikers Guide To The Galaxy or War Of The Worlds), Print (so Books or Comics) even Video Games. Obviously we are only talking about fictional aliens, so Scientologists are not applicable and neither is Herr D because we're looking at entire races rather than individuals. As per usual, I've given you 10 to start with and you can add your own suggestions. Please make sure you include the franchise that the species you nominate originate from in your suggestion and please, please only one suggestion at a time.