Edoardo Mangiarotti

Foil and épée. Mangiarotti won 13 Olympic medals, six of them gold, across both weapons between 1936 and 1960, still the most by any fencer. Naturally right-handed, he was trained by his father to fence left-handed, because left-handers' attacks come from an angle most opponents rarely face. His career is the best illustration of how one fencer can adapt between foil's right-of-way rules and épée's whole-body, first-to-hit game.