Who was Biggest selling artist of the 80's?

This is actually a matter of musical taste. Some will immediately chime in with "Michael Jasckson," who clearly was a staple of 80's music. Then there are the people who never listened to that style of music and prefered the likes of Metalica (who formed in 1981) Guns N' Roses, Meat Puppets, etc. Furthermore, there were people that were into bands like The Cure, Depeche Mode, Men at Work, Flock of Seagulls, etc. As far as generating money, I would bet on Michael Jackson, but that doesn't take into account the country artist, early rap artist, or metal artist.