If I saw a lady in Egyptian costume and a ceremonial false beard, I’d guess Hatshepsut, but that’s sort of my main point – most historical figures, with a few obvious exceptions like Jeanne d’Arc or the Chevalier d’Eon, just wore the usual clothes of their time, so they’re not that identifiable unless you can carry a prop (Trillian in the movie version of HHttG goes to a party in a suit, top hat, fake beard, and carrying a toy beagle, but even then only Arthur guesses she’s supposed to be Darwin: “everyone else keeps calling me Santa.”)
There’s a reason people dress as Batman but not as Bob Kane, and I suspect Albert Einstein’s fame in popular culture has to do with (a) living in the era of photography, and (b) being easier to pick out of a lineup than Werner Heisenberg.