So many sedges, which ones to try is a question for gardeners. Here are some that are looking great in Minnesota: 
Carex grisea, foreground; and Carex bromoides, background: May 21, 2020
Carex rosea, foreground; Carex grisea, center; Carex bromoides behind C. grisea June 4, 2020
Juncus tenuis, foreground; Carex rosea, center and Carex muskingumensis ‘Little Midge’ background, June 4, 2020
Carex montana, June 4, 2020
Carex montana, May 21, 2020; see previous post for photo in April 2020
grasstalk 