The best villain in all of Dragon Ball is easily the galactic overlord Frieza himself. From the moment he first debuted, this diabolic mastermind proved he would rule over anyone weaker than him ...
With the Ginyus trapped in Hell, they're unable to continue to grow stronger and, in the anime, they're surpassed by Tien Shinhan, Yamcha, and Chiaotzu before the Frieza Saga is even over.