Q.I,m Looking For Disease Free Ground Cover Perennials.
These plants should be hardy and flowering.

Certified GKH Gardening Expert
There are several choices, depending on where you are located. Some of these include:
Creeping Phlox, Creeping Thyme, Candytuft, Creeping Jenny, Deadnettle, sedum, and Vinca, to name a few.
https://www.gardeningknowhow.com/ornamental/groundcover/creeping-phlox/creeping-phlox-planting.htm
https://www.gardeningknowhow.com/edible/herbs/thyme/growing-creeping-thyme.htm
https://www.gardeningknowhow.com/ornamental/flowers/candytuft/growing-candytuft.htm
https://www.gardeningknowhow.com/ornamental/cacti-succulents/sedum/growing-sedum-groundcover.htm