This attractive little bunchgrass might be exactly what you need in shady or damp spots in your garden. Growing naturally along creeks and seeps and in forest clearings, tufted hair grass can tolerate a range of sun and moisture conditions, although in sunnier spots it will definitely want more moisture.
This medium-stature grass has a bunching habit, but can be used as a ground cover when planted en masse. From my own experience, this grass can handle heavy browsing (by voles in my case), and will bounce back from practically nothing. It can handle a wide variety of soil types and for that reason is often used it reclamation plantings. It's a survivor for sure, but also good looking; check out those delicate seed heads that provide visual interest through the fall.
This grass would provide good structure to a planting interspersed with ferns, merten's sedge, large-leaf avens, and self-heal.
Photos: Matt Lavin, CC BY-SA 2.0 <https://creativecommons.org/licenses/by-sa/2.0>, via Wikimedia Commons
tufted hair grass
Deschampsia cespitosa