The best villain doesn't need to defeat all the other villains in a hypothetical fight. (Thorne, Noel. "Why the Joker Is the Greatest Comic-Book Villain." Sequart Organization. N.p., 05 Apr. 2014. Web. 06 Sept. 2016.) They don't usually have the superpowers or the craziest mind, they just have to have good character. Bring good events into the story and his ability to challenge the hero.
One thing that may