Despite my deep-set aversion to heathers, the answer to this is yes. In a sunny spot and with acid soil that is neither dust dry nor waterlogged, heathers will do a good job of covering the soil with evergreen foliage and, at the right season, colourful flowers.
My issue is that, having spent most of my life coveting acid soil, heathers seem an awful waste of soil that would be perfect for something a great deal more interesting. Heathers have their merits but I find their rather indifferent foliage boring. It is just my opinion but I think that if you do use them, you have to try to select a range that includes some foliage variation, whether colour or shape and size.
If planted at 45cm apart, heathers will fill in and cover the soil after about three years. You will have to weed between them in the meantime. And you must clip them over after flowering or they will soon become loose and start to fall apart.
I am often asked if they will grow in shade and the answer is no. These are not for ground cover in shade. Just think of where they grow in nature (the hardy kinds anyway) – they grow in moorland with only a speck of shade from a gorse or birch or rowan. So planting around the light shade of birch is possible (I have done this myself) but not under an oak tree or the north of a wall (in the Northern Hemisphere).
Of course, although summer heathers (Calluna and Erica) need acid soil, the winter-flowering heathers do tolerate lime. These are the only ones that I have allowed into the garden so far apart from a daboecia which has such large flowers that I can pretend it is not a heather. I have acid soil which is fine for the winter heathers, even though they do not need it, and the summer heathers too.
All are good plants for bees and butterflies and, if you have grouse, they will thank you too.