Belton HS and Lake Belton HS bands are honestly underrated IMO. Lake Belton went to the state marching contest two years in a row, and those two years were the first that they were even open at all. I think because they're in area D, and Belton had been 6A up until 2022, they were covered up, and also probably because they're from a small town but that could just be me.
I know this was supposed to be about marching band but in the same region, Midway HS's wind ensemble is one of the best I've ever seen for a high school band. They took Wine-Dark Sea by John Mackey (all of it) to UIL in 2022 and was absolutely amazing