Science would be Newton, Darwin and Einstein. Of course there are huge numbers of others worthy of a mention, too.
Music I'd probably put Beethoven, Mozart and Bach.
Literature and Art I guess Michelangelo, Shakespeare, Dickens and DaVinci.
Then you've got your Descartes, Socrates, Galileo, Plato, etc.
Ah, it's too hard!
But I figure any Top 10 has to have Einstein, Darwin and Newton. Those 3 delivered really big.
Try to be reasonable... its easier than you think...