It's the Clown Prince of Crime the Joker vs. the Mad Titan Thanos. They’re both great villains but which one is truly the best...or the worst we guess. Join WatchMojo as we see which one is truly the greater villain — Thanos or the Joker — to the heroes of their respective universe. The characters have vastly different approaches and backgrounds but as two of the most prominent villains in comics they’re united by their desire to spread evil and death. Oh and purple. They’re both all about that purple.