11. Alberto Salazar
One of the world’s most famous running coaches, Salazar influenced a bevy of athletes. These included British long-distance superstar Mo Farah and other Olympic stars. But he became embroiled in a major scandal in 2019. It emerged that he encouraged doping in multiple athletes.
Then things became worse when sexual misconduct accusations proved to be true. He received a lifetime ban from the sport because of his horrendous abuses. Salazar also inadvertently tarnished the names of some big stars by association (via Daily Camera).