Here's my list
Wikipedia has Kansas listed as a Southern Rock band.They also have Kenny Wayne Shepherd.KWS is great but I don't know if he is Southern rock.They also list Stevie Ray Vaughan.
Kansas' genres according to Wikipedia: Progressive rock, hard rock, art rock
Kenny Wayne Shepherd's genres according to Wikipedia: Blues, blues rock
Stevie Ray Vaughan's genres according to Wikipedia: Rock, blues, blues rock, electric blues, Texas blues but yet on their list of Southern Rock Bands Stevie Ray Vaughan & Double Trouble are incorrectly listed as a Southern Rock Band
Kansas and Kenny Wayne Shepherd are listed on Wikipedia's list of Southern Rock Bands with an ♪, which means Bands (rock or hard rock) that cite Southern Rock influence