As any former Olympian who's ever had a speaking engagement will tell you, the purpose of the Olympic Games isn't to win medals or set records.
The purpose is be remembered.
So who managed to escape the four-year sinkhole of cyclical anonymity and forever burn his or her likeness into our public consciousness?
But first, a few procedural notes.
1) We're writing this from an American sporting perspective. I know David Rudisha will long be remembered by Kenyans and running aficionados. We do not speak for those groups.
2) We aren't including athletes who either made their mark at previous Olympiads (Bolt, Phelps, etc.) or those who were already famous (LeBron James, Andy Murray, etc.).
3) Employees must wash hands after using the restroom.