First row of plants, next to the seawall, is Golden Creeper.
The next row is alternating Dune Sunflower/Beach Daisy and Blanket Flower(Gaillardia), with a Railroad Vine at each end. The railroad vine is very aggressive and was advised to use them sparingly. The following are pictures of mature plants. Mine are not that big yet. Hopefully, by the end of summer...
Dune Sunflower/Beach Daisy
Blanket Flower (Gaillardia)
Railroad Vine