It's not a Gray or a Peeper.
You've probably already found a list of Texas frogs, but here's Wikipedias
List of amphibians of Texas - Wikipedia, the free encyclopedia
The other three chorus frogs look like possibilities. From pictures I favour the Upland Chorus frog,
Pseudacris feriarum, but this is really a guess as I'm not familiar with any of your chorus frogs (except Spring Peepers which we have in abundance).
Every time I look at a list of amphibians from a southern state I end up feeling jealousy at the diversity you have. Thanks for sharing your nice find and pics

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