I'd have thought Jim Peters' marathon run when he entered the stadium 17 minutes in front of the other runners, yet did not finish, would have featured.
No Tim Henman against Goran Ivanisovich? Should definitely be in there above 2010 England football team, who were rubbish rather than chokers.
It was Henmans ONLY real chance of a Grand Slam Final and was playing a veteran semi injured wild card
Jana Novotna was known as the Choking Czech.