People like Einstein, people who do their own thing, aren't exactly the best candidates for links until they breakout. Einstein was no people-person, no football player, and he certainly was no politician.
He's the sort of bloke who would've gotten good SERPs right away at Yahoo and at Google only AFTER he'd done something that not even the most critical person could deny was great ... which discounts much of his work.
Kafka is another good example; he'd have gotten plenty of links, but only after he was dead, because that's when people recognized his talent. If the web had been around when these people were, would you find them?
I guarantee that for a very sad period of time if you "Googled" their names you'd have gotten people talking about them in forums followed by countless keyword traps redirecting you to places to buy German beer mugs and maybe around #210 you'd find the sites the people in question actually created.