In the DFW area, I've had the best success with Okra. They love that full-on Texas sun. However, this is about year three for me of growing and I've through trial and error determined that for this area and sun, things that say they need full sun still do, but you gotta have some kind of sun-shade over them for them to grow. After that though, everything else is great that I've tried: corn, squash, cucumbers, radishes, carrots, beans, bell peppers, jalapenos. I've had trouble with tomatoes. They're really tough for me for some reason. They always seem to get diseased. I'll keep them off the ground with hay mulch and staked vertical, and I spray them with fungicide, but something always happens.