The antonyms for "most heavy-footed" would be "light-footed," "graceful," "nimble," "agile," and "fleet-footed." People who are light-footed move with ease, grace, and fluidity. They could be dancers, athletes, or even everyday people who display a natural lightness in their step. Graceful individuals move with elegance and poise, often displaying a delicate sense of balance. Those who are nimble are quick and light on their feet, able to move swiftly and with precision. Agile individuals are both quick and graceful in their movements, often displaying an impressive sense of coordination. Finally, fleet-footed people move with speed and are very quick on their feet.