Digging deep into the past, Lionhart are pure Southern rockers. There is very little information on the web about Lionhart but fans of Thin Lizzy, Lynyrd Skynyrd, and Molly Hatchet will appreciate this forgotten band. Maybe not metal but still a good Texas band that can bring it.
From the Texas Psych music group: Founded by ex-Saturnalia band leader Craig Bransfield, Houston band Lionhart released one album and toured regionally. Despite offers, Craig was never able to bring himself to sign a major label recording contract, which I believe is why this music isn't as widely known as it should be. Now you can listen to it for free. Definitely Texas Psych with a hard rock edge.