Arthur Lydiard who was a well known running coach, coaching athlete to many world records and Olympic gold medals. He was the originator of the 100 miles a week training regime.
Abebe Bikila won the 1960 Rome Olympic marathon running barefoot. He is often held up as a poster boy by the barefoot running community. He went on to win the 1964 Toyko Olympic marathon in world record time, this time wearing shoes.