Posted: 04/03/2016 at 18:16
Need more info - what aspect - sun or shade etc. What sort of size are you looking for?
I use Heucheras and Tiarellas, Pachysandra and prostrate Gaultherias in shady areas. All fairly small. Vinca is fine too but many people find it invasive. Osmanthus burkwoodii is good too - bigger than the aforementioned, as is Sarcococca.
Most of my 'sunny' plants are in raised beds to counteract the clay, but you'll get more suggestions from others for that aspect