#1 Diego Maradona

While many regard him as one of the greatest of all time, he is also considered as the most controversial player of all time for multiple reasons. Of course, we remember the famous 'hand of god' incident that completely flipped the football world and brought the opposition to its knees. However, this is just one of his many incidents.
Maradona is a perfect combination of fame and misery, while the aftermath of fame resulted in his own misery. His 1994 World Cup campaign ended in ashes as he was tested positive for a banned substance known as ephedrine and was sent home immediately, ending his international career once and for all.
However, this wasn't the end as during his time with Napoli he got a lengthy suspension on his career for cocaine abuse, an addiction that would later destroy same career. Well, his cycle of controversies are yet to cease even after his retirement.