Here are some files over elite and professional vegan athletes, in activity.

Fiona Oakes (ex cyclist, now marathon runner)
Dorina Vaccaroni (cyclism, ex OS champion in fencing, still in italian)
For our team: Christine Vardaros (Cyclo-Cross, Road, Mountain Bike Racing)
Adam Myerson (cyclism)
Jason Sager (MTB, cyclism)
Scott Jurek (ultramarathon)
Brendan Brazier (triathlon, ultramarathon)
Alexander Dargatz (body building)
Kenneth G. Williams (body building)
Katie Coryell (Pro Surfer)
Tonya Kay (Dancer)
Keith Holmes (Boxer)

You can read about more vegan athletes on this
direct link to a costantly refreshed list on the veganfitness