Not sure how I forgot these few, but some great music out of Alabama as well:
Jason Isbell/Jason Isbell & the 400 Unit - storytelling and songwriting master
Muscadine Bloodline - great harmonies and getting better in all facets with each album they release
Red Clay Strays - Rising popularity, criminally underrated in my opinion
Someone a while back mentioned Dave Cobb... 100% agreed. Anything he touches seems to agree with my ears whether it be Americana, Country, Rock, etc.
Short list: Chris Stapleton, Jason Isbell, Brent Cobb, Colter Wall, Whiskey Myers, Rival Sons, Sturgill Simpson, Jamey Johnson, Marcus King Band.