Last Minute Hugel for September Planting - What Should I Grow?!

Greetings!
I'm just north-east of Houston, Zone 8, where the terrible heat of summer is showing signs of surrender to fall rains.

I pulled up my roots from this land, metaphorically speaking, in the Spring when the house was put on the market, but as deal after deal falls through and another season passes, I fear my roots will soon rot if I don't get back into the ground. The house MAY sell any day, but I can't keep living like I won't be here tomorrow.

So, I'm starting new garden beds. I have renewed last years beds with compost, but I also want to start at least one brand new hugelbed for this Badge Bit: https://permies.com/wiki/98574/Build-Hugelkultur-PEP-BB-gardening
The Badge Bit specifies several required species, off which I have already acquired the Sepp Holzer grains, but I have some leeway in choosing other plants.
What could I find that would do well in my climate and tolerate, if not prefer, fall planting? Thank you very much for helping an inexperienced gardener out!

Fall broccoli, kale, chard, & peas do well in the Austin area. The climates are about the same. Peas would satisfy the nitrogen fixer requirement for the BB too.

Was thinking about this more today Harmony. Cauliflower & leafy cabbages did reasonably well for me there in fall/winter. Heading cabbages were less successful. Plus cilantro. If it's started now cilantro will survive winter & get huge in early spring. Spinach was sometimes a good one for fall but that seemed to fluctuate according to the weather any given year.

My wife's cousin from Houston just visited and showed us some of the flooding pictures from a couple years ago. You may already know this, but your post brought to mind how a hugel makes a pretty dangerous dam, especially in the first year before the wood is waterlogged and held down by roots and mycelia. Anywhere flooding is possible, especially around structures, ensure positive drainage of at least 1% around the hugel bed.

All that said, strawberries love hugels in my climate, and it seems like they would grow better in the shoulder seasons in yours.