Light Yagami from Death Note is, in my opinion, the best anime villain. He’s an honor student of a police chief who is himself going to school in law, and the last person someone would suspect to be murdering hundreds of people, innocent or not. He also doesn’t look the part. I know in most anime, this doesn’t mean much, but, given his good looks and charm, it’s hard to imagine him being “Kira”.
Aside from all of that, Light is also the best villain because how cunning, clever, methodical, manipulative, and down right brutal he can be. It’s crazy how well thought out and detailed some of the murders in his Death Note are, and how he uses all the people around him to further himself towards his obscene sense of justice and world domination. Light Yagami as “Kira” was truly a force to be reckoned with, and is the best anime villain.