some suggestions for area in the shade Hellebores ,Ferns , Anemonies and mahonias winter jasmin and camilias .

Lots about this subject on here, type in the search box on the right 'plants for shady places'

Also, your namesake! Shrubs include Aucuba and Fatsia, there are lots of spring/early summer flowers, but not so much for later on. Rely on leaf shape and colour for other seasons.

have a look at my plant list. most of my garden is shady. tags under beech tree, and shed border in particular.
welcome to GoY too.