I don't quite know but you have recieved some pretty good answers so far......
I would say many of the performers from the "motown era" of music as well as the beetles and performers like Elvis, Micheal Jackson, as well as many early rap/hip-hop artists.
Other classic performers I would be sure to include are:
The Beach Boys,
and Fleetwood Mac.
Earth, Wind and Fire,
KC and the Sunshine Band,
Hall & Oates,
George Michael (and Wham),
Rick Springfield and Culture Club
And Many more!!!!
Soo many performers have had an impact and lasting influence on the popular music of today.