Emperor of the United States
Mark Twain worked right next to Norton's boarding house and "claimed that the man wasn't so insane as people thought", and supposedly also based the character of "The King" in Huckleberry Finn on him. Norton also corresponded with fellow heads of state like Lincoln and Queen Victoria.
EMPEROR [strike]HUb' Mr. Manley[/strike] NORTON
At the pre-emptory request of a large majority of the citizens of these United States, I Joshua Norton, formerly of Algoa Bay, Cape of Good Hope, and now for the last nine years and ten months past of San Fransisco, California, declare and proclaim myself the Emperor of These United States. - September 17, 1859
Who does this guy remind you of?