A thread at Search Engine Watch Forums named Who ARE the three most powerful people in search? has a poll asking you to vote. This all comes from a thread named You're In A Room With The Three Most Powerful People In Search, based on DaveN's Most Excellent Google Adventure (with JenSense & ChrisR). Oh, by the way, some people are not too happy with that adventure.
So far, by way of popular vote, Google and Yahoo's founders are in the lead. Five votes a piece for Sergey Bryn and Larry Page. Jerry Yang has four votes, while Bill Gates only has two votes. Cast Your Vote for the Three Most Powerful People In Search.