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Groucho Marx. Actually created via greasepaint, as was his iconic mustache (which is why he's here and not down in Real Life).
Thufir Hawat in Lynch's Dune. They're pretty big.◊ It's possible this was supposed to be shared among mentats, at the other one, Piter DeVries, has some big ones too◊, but they're still not quite as big.