Who is the most famous person in history that we have no idea what they looked like

Cleopatra

I’m fairly sure it’s got to the point where most Quorans know she didn't look like this:

I'm not going to insult your intelligence. But she also probably didn't look like the plain, hook-nosed and manly depictions on those busts and coins, either.

The former is due to the popular culture view of her as a seductive, irresistible beauty and the latter is thought to be due to powerful propaganda depicting her to be more masculine and like her ancestral male rulers to justify a young female ruler. And sources don't help either: Plutarch describes her beauty as ‘in itself neither altogether incomparable, nor such as to strike those who saw her’ - in other words, not particularly a sight to behold - whereas Cassius Dio called her a woman of surpassing beauty’.

So basically, there’s not much solid evidence to go on.

But then again, that doesn't really matter. Cleopatra’s allure came mainly from her wit, charm and intelligence - for instance, she is said to have spoken 9 languages, was interested in mathematics, astronomy and had written a book on medicine and was a charismatic and excellent conversationalist.