Sulphur buckwheat is a woefully underused plant in landscaping. It fills multiple niches, including groundcover, showy flowering specimen, and pollinator resource. Tightly-knit green and red leaves with silver undersides stabilize small slopes while showy cream to salmon flower heads tower above. This species colonizes dry grasslands, meadows, and even shady dry forest (particularly under pine trees) so finding a spot for one (or more) shouldn't be challenging. 
 
Sulphur buckwheat is long-lived. I've seen some impressively large colonies, but they are slow to develop. You don't have to worry about this species being a bully.
 
While it isn't marked as 'deer resistant', in my experience the deer seem to only eat the flowers. So if you are planting it as a ground cover, deer shouldn't be much of an issue.