#4 – Lance Armstrong (Cyclist)
Lance Armstrong won seven consecutive Tour de France titles from 1999-2005 and would have been considered the greatest cyclist of all time, except for one problem.
There had been rumors of Armstrong cheating as far back as his first Tour de France victory, but he was always able wiggle his way out. In 2012, everything finally caught up to Armstrong and he was stripped of his titles for doping.
Cheating is never the right way to go, but when you lie about it constantly year after year it only makes things worse.
At least Armstrong has raised a ton of money for cancer research, so I will give him that.