The state that is, not the country.
Music: I’ll go with Otis Redding, who was born in Georgia and played in Macon early in his career. Favorite song: Fa-Fa-Fa-Fa-Fa (Sad Song). Here is the Georgia Music Hall of Fame. Most underrated might be the acoustic bluesman Pink Anderson. And I still have guilty sympathies for pop musician Tommy Roe ("Dizzy," "Sweet Pea," "Sheila").
Artist: No, Georgia O’Keefe doesn’t count. Most of the ouevre of Outsider Artist Howard Finster is churned-out junk, but his early work was excellent. This painting isn’t bad either, or try here. It was, however, a mistake when he finished 67 paintings in one weekend while visiting Wake Forest University.
Addendum: Hey, did I forget James Brown? The hotel TV in the background notes he is from Augusta…