I see he left out the obvious comparisons to Caligula and Vlad the Impaler.
He went light on the mention of Hannibal Lector too.
Yeah. Not to mention Ivan the Terrible, Lex Luthor, Sauron, Snidley Whiplash, and Cthulhu. I'd mention Lord Voldemort but Colbert's already used him.
Trump drives these people nuts, and I'm not kidding. Twitching, babbling, delusional, rubber room, howling-at-the-sky nuts. Fun to watch but it's more than a little scary.