Good list - I’d add Mo Green
Check out The Cadillac Three
My buddy from college loves Whiskey Meyers. He is the only black guy I know who loves country. It is all he listens to and he credits me for turning him onto it in college.
I will add one more to your list that I have come across lately that is some real country goodness. That would be Sturgill Simpson. A few naughty words in his tunes but they are real country.