Here's a list of what I grow, all of them pretty much carefree.
Bergenia (Bergenia cordifolia)
Bicolor epimedium (Epimedium x versicolor 'Sulphureum')
Big root geranium (Geranium macrorrhizum)
Columbine "Cameo Mix" (Aquilegia "Cameo Mix")
Columbine "McKanna's Mix" (Aquilegia "McKanna's Mix)
Coral Bells "Bessingham mix" (Heuchera "Bessingham mix")
Coral Bells "Purple Knight" ( Heuchera "Purple Knight")
Cupid's dart (Catanche caerula)
Daylilies (Hemerocallis)
English Daisies (Bellis perenis)
Foxglove (Digitalis purpurea)
Globe Thistle (Echinops ritro ssp. Ruthenicus)
Hardy sweet pea (Lathyrus latifolius)
Japanese Anemone (Anemone japonica)
Lambs ears (Stachys byzantina)
Lithodura (Lithodura diffusa)
Meadow Rue (Thalictrum aquilegifolium)
Mountain Sandwort (Arenaria montana 'Avalanche')
Penstemon (Penstemon, barbatus)
Peruvian Lily (Alstromeria aurea)
Pink Yarrow (Achillea millefoium)
Pinks (Dianthus alwoodii alpinus)
Primroses (Primula polyanthus hyb)
Purple Coneflower (Echinacea purpurea)
Saxifrage (Saxifraga)
Sea Statice (Limonium latifolia)
Sea Thrift (Armeria Alliacea Hyb)
Sedum Autumn Joy (Sedum telephium "Autumn Joy")
Spring Vetchling (Lathyrus vernus)
Sunrose (Helianthemum hyb)
Sweet William (Dianthus barbatus)
Veronica, Pink (Veronica spicata 'pink')
Veronica, Purple (Veronica spicata 'purple')
Violets"The Czar" (Viola odorata "The Czar")
Violets, pink (Viola odorata 'pink')
Many of these were grown from seed. And many of them are now 20 years old and still going strong. The deer don't eat any of them and the slugs don't bother them either. They don't require staking, dividing or lots of fertilizer. And most of them are drought tolerant too.