Sarcococca is good in shade and smells nice in winter.
Cornus mas seems to be coping as shade has overtaken it.
Choisya does surprisingly well in shade. Euonymous fortunei in all its many varieties.
Hazels are good.
ferns, hostas, aquilegias, foxgloves, pulmonarias, dicentras, some of the hardy geraniums, epimediums.
Will that do for a start. I'm sure there'll be more suggestions
Thanks Nutcutlet & Ceres ....
I've got an area like this and have some of the plants you've mentioned. Should look less drab this year.