Welcome Ginny
So nice to have you. I definitely would start out with the Villosa's that Bob mentioned and then go from there. I know your sun is different from our sun, so I would err on the side that less is better. The villosas tend to be more vigorous and do better with the heat.
Some of the Villosas would include plants such as: Brownies, Southern Comfort, Autumn Bride, Citronelle, Caramel and Bronze Wave to name a few.
Were there specific heuchs you were looking at?