Dr. Gero is a remnant of the Red Ribbon Army (check Commander Red and Purple in the DB villains), a brilliant scientist and a mad android makin' mutha. He designed all of the androids that end up Jorge fin the Z fighters in the Android Saga and movie 7. Let's see, that's Androids 13-18, right? Not only that, he turned himself into an android. Unfortunately he just wasn't a good android. Ooh ooh, and don't forget he created Cell. For these reasons you'll see I included him but excluded the other androids. They were bad but they were his minions and creations. He's the fellow that started the whole thing so he gets the credit as the Super Villain.