I would try some honey locust. Black locust is nice too, though honey locust also has delicious “honey” in the pods that can be eaten come fall. I’ve also been noticing how green the grass grows under the nearby honey locusts. Their leaves let in a lot of light, too, but so do black locust. Both would be good for growing other plants underneath, whether fruits, herbs and vegetables, etc. I’ve noticed milkweed and nettle, good fiber plants, also growing beneath black locust.