10809 plant recommendation

I have a wide steep bank (30 degree ish) above a planned swimming pool area.
Currently covered in wild grasses or bare earth.
I would like to cover the bank in plants requiring little ongoing maintenance (and no watering outside of natural rainfall). I understand some plants are better for trapping dust in windy conditions and some attract insects away from the pool. I thought of planting herbs (rosemary, thyme) and would like a natural look, foliage preferred, nothing too flashy.
What would you recommend?

Thanks in anticipation.