Demon King vs. Clown Prince

One is Randall Flagg, Stephen King's multiversal devil—smiling "like the last light of sunset," voice honey over broken glass. The other is the Joker, Heath Ledger's scarred id—voice switching from carnival barker to funeral director in the same breath.

Flagg builds hierarchy from ruin; the Joker tears off the mask and makes you watch. If Flagg is the CEO of the abyss, the Joker is its brand ambassador.