Here comes No Quiero with another theory, why did you add alive person like Maradona and Pele if you were talking about  most famous dead people. Just admit you don't like Michael Jackson, you were putting the same theory how your villagers knew Pele and Maradona.
Michael Jackson can be compared with Elivis and  Beatles , he has sold more than 750 million album world wide. Don't say Micahel Jackson is like Frank Sintatra, just remember  Micahel Jackson is the person who changed music industry with short movie type of music video. Nobody did that before Micahel Jackson, you can see his influnce every where upto Bollywood dance.  Did you forget  Elvis Mania and Jackson Mania?

PS: The best selling artist provided is extremely confusing.