INFp is one of the types I have the most difficulty identifying, so the following typings are even more tentative than the others - -
Elagabalus, Emperor of Rome 218-22 (I'm not sure what else he could be, though)
Ludwig II, King of Bavaria 1864-86
George IV, King of England
Ken Livingstone, Mayor of London (and possibly the Devil)
I found him almost impossible to type according to a general impression of his personality. But according to quadra values and dichotomies, INFp seemed the best fit.
Napoleon III, Emperor of the French 1852-70