Yeah I’m in 6a and can grow almost all peach trees. Even some low chill peaches are high chill adaptable like the Nectaplum.
Some good ones are
Carolina Gold
Ernie’s choice
Red Skin
Redhaven
rio oso gem
Hundreds more. These are ones I would like to try, and will be. I have 2 nectarine trees and 2 peach trees, each has grafts of other cultivars one them. I hope to have about 8-12 cultivars once I’m done