Texas is blessed with a wealth of beautiful native shrubs. Here's a partial listing of some that like part sun to part shade conditions, are drought tolerant (meaning once established
they should need very little watering), and are attractive to birds, hummingbirds, butterflies, etc.
prairie acacia, flame acanthus, wooly butterfly bush, ceanothus, Mexican orange/ fragrant starleaf, coral bean, apache plume, stretchberry, purple sage, spicebush, turk's cap, rose mallow, blue shrubby sage, coral berry, yellow bells/ yellow trumpet bush, viburnum
These are all more or less in the same size class as your roses. Some are evergreen, many have showy flowers. They are all listed as commercially available, but some would be easier to find than others. You will want a good native plant nursery. This has a listing of TX native plant nurseries: https://findnativeplants.com/southwest/t ... ve-plants/
This could be so much prettier, more interesting, and livelier than your row of KO's!