Not to belittle Einstein's genius, but if it weren't for his hair or his cute little expressions, would he be a household name? Do people really know his name because of his genius, or because he was a genius and could be turned into a pop icon of sorts.
Think about many of scientists that are household names: Einstein with the crazy hair, Hawking with the wheelchair, Edison and the lightbulb, Newton and the apple. Each of these people, while geniuses, have something that pop culture can latch on to, and basically turn their name more friendly and less intimidatingly technical.
My point here is: how many other geniuses have lived that we barely know of, simply because they don't have a "thing"?