In terms of "human beings that are likely to be born", I'd really put Leonardo da Vinci on top. If you want to really go back in time, probably Homer (if he existed) and Aristotle should be considered as well. Immanuel Kant is a good example, too. In the arts, what about Van Gogh? And Giotto? In sport, it has to be Pelé more than any other. In addition to having such a great footballing technique, he was exceptionally fast, strong, durable, could jump like a cat and was not frightened by big stages. If he'd been born in 1990, he could now probably rival any Olympic athlete.