A very important point to consider when using these bronze colored plants is that you must pay attention to the surroundings before you plant them. A brown grass planted in brown mulch will not give the color contrast you need! Instead, use them in colorful containers or surround them with brightly colored plants or different colored hardscaping (rocks, pavers) to make their unusual foliage stand out.
Below are pictures of cultivars we have trialed in the last 5 years. They range from the tall and curly to the soft and cascading. Some of them overwintered depending on the winter and their location, but were not reliable enough for us to call them perennials.