You guys have hit the sweet ones. I'll through out some from the golden age of southern rock. A few might be a bit more bluesy, but still have good examples if you investigate.
Allman Brothers
Lynyrd Skynyrd (before the plane crash)
Charlie Daniels Band
Marshal Tucker Band
Elvin Bishop
Wet Willie
Atlanta Rythum Section
The Outlaws
Molly Hatchet
38 Special
Ozark Mountain Devils
Black Oak Arkansas
Allman Brothers
Lynyrd Skynyrd (before the plane crash)
Charlie Daniels Band
Marshal Tucker Band
Elvin Bishop
Wet Willie
Atlanta Rythum Section
The Outlaws
Molly Hatchet
38 Special
Ozark Mountain Devils
Black Oak Arkansas