Akira Toriyama's Dragon Ball has endured for nearly four decades, and one of the biggest reasons that it's more popular than ever is the vicious villains who threaten the universe. An anime is often only as good as its antagonists, and when it comes to Dragon Ball, it's hard to top the tyrannical terror Frieza. Frieza first gains notoriety during the heroes' trip to Planet Namek to collect its Dragon Balls, but he remains a pivotal player in the franchise long after his initial death.
Source：https://www.cbr.com/dragon-ball-frieza-evilest-actions-ranked/
