Consider Casanova

It's surprising, given how legendary his personality has become since his death, that people generally know very little about him:

Today, Casanova is so surrounded by myth that many people almost believe he was a fictional character. (Perhaps it’s hard to take seriously a man who has been portrayed by Tony Curtis, Donald Sutherland, Heath Ledger and even Vincent Price, in a Bob Hope comedy, Casanova’s Big Night.) In fact, Giacomo Girolamo Casanova lived from 1725 to 1798, and was a far more intellectual figure than the gadabout playboy portrayed on film. He was a true Enlightenment polymath, whose many achievements would put the likes of Hugh Hefner to shame.

He hobnobbed with Voltaire, Catherine the Great, Benjamin Franklin and probably Mozart; survived as a gambler, an astrologer and spy; translated The Iliad into his Venetian dialect; and wrote a science fiction novel, a proto-feminist pamphlet and a range of mathematical treatises. He was also one of history’s great travelers, crisscrossing Europe from Madrid to Moscow. And yet he wrote his legendary memoir, the innocuously named Story of My Life, in his penniless old age, while working as a librarian (of all things!) at the obscure Castle Dux, in the mountains of Bohemia in the modern-day Czech Republic.