Frost grass (Spodiopogon sibiricus) | Warm season, green foliage, 3' x 4' with flower, part shade, moist, flowers midsummer, Zones 4-8, Origin: Asia
Solidago - Golden Rod
Sesleria caerulea Blue moor grass USDA 4-9 This compact blue green foliaged Sesleria is native to northern Europe and the British Isles
Plains oval sedge (Carex brevior) is a plant we ended up with by shear fluke. You don't hear about this plant a lot, but I think it deserves some recognition. I think it would be fantastic in a mass planting with alliums, salvias, etc.