I really love all the natives, including native grasses. Buffalo Grass is probably my favorite. It doesn't grow very tall. There are some ornamental grasses that grow here that I think look attractive over winter but, I admit this is one area of plants that I haven't learned the names of.
Unfortunately I have $* @%## er, I mean bermuda grass trying to take over my cottage garden! Last year I tried cardboard boxes covered with mulch that might have slowed it just a tad and the year before tried that cloth ground cover stuff but it didn't work so may have to find some old shingles.