Every garden should have a Carex elata 'Bowles Golden' I do believe, for it offers radiance even in the darkest days.
A slow growing broad-leaf sedge with white margins, Carex siderosticha 'variegata' (KAIR-ex sid-er-oh-STEE-cah), partners with several alstromeria and this true blue of my favorite Salvia patens.