Is it moist or dry?

Dry shade under a large Acer.

Millium effusum Aureum Bowles Golden Grass or Millium effusum Aureum Bowles Golden Grass good for dry shade it brightens up a dark corner from spring to early autumn with it’s bright yellow foliage and its ever green
Geranium nodosum semi-evergreen cranesbill, glossy mid green foliage and lilac flowers with dark veins all summer, hardy and likes any soil.
Luzula sylvatica Wood rush ornamental groundcover.
Stachys macrantha is a medium-sized herbaceous perennial with rough dark green leaves and flower spikes of rosy-mauve flowers in early summer.
You could research the above and see if they would be right for you?
Grasses can work well? Take a look at look at Acorus, Carex, Milium (see above), Molinia Variegata, Luzula