Blackfoot Daisy is a good perennial but it also works as a groundcover!

Golden Groundsel is a wonderful pollinator friendly ground cover

Juniper Hairstreak on Golden Groundsel

Gray Santolina

Gray Santolina in bloom

Heartleaf Skullcap

Horseherb

Lyreleaf Sage

Pigeonberry

Prairie Verbena can be adapted as a groundcover

Bicolor Sage

Woolly Stemodia, the best groundcover for full sun and it is deer resistant

Woolly Stemodia along a roadway median