#1 Lance Armstrong
Lance Armstrong was once the most revered name not only in cycling, but also in the whole sporting world. Lance Armstrong had won 4 major titles before succumbing to cancer in 1996. The chances of Lance coming back in cycling were bleak, but he miraculously returned in 1998 after successfully completing his chemotherapy.
Armstrong won a plethora of titles after returning from cancer. Returning to cycling in 1998, he became a member of the US Postal Discovery team. He won his all Tour de France titles which started in 1999 and the bronze medal in the 2000 Summer Olympics as a member of this team. Armstrong retired from International career after the 2005 Tour de France.
News of Armstrong caught in doping came as a shock to the whole world in 2012, as the spirit of the game was blotted. Fans were appalled at the confession made by Armstrong in an Interview in 2013 and Lance drew worldwide criticism. He was stripped of all his medals from 1998 onwards.