This was posted on Marginal Revolution. Tyler’s suggestion is:
Keynes pops to mind as one contender. He was a top-tier intellect and economist, he was closely connected to the arts, had plenty of brilliant Bloomsbury people to chat with, married a ballerina, played a major role in politics several times, and he participated in several critical and indeed formative moments of history (Treaty of Versailles, fiscal policy, Bretton Woods). He experienced both world wars (no one said “interesting” has to be good!). Still, he didn’t travel enough to be a slam dunk (I can’t quite bring myself to write “nor did he have the internet.”)
The post has links to many more.