Well I have a Fatsia japonica in my north facing corner by the shed that does marvellously once established. Two (third coming soon) Acanthus in heavy shade, a pyracantha east facing that has gone mental in one year! A north-east facing Hebe Midsummer Beauty that is no trouble in a heavily shaded corner and flowers profusely in summer, several euonymus that never complain and a couple of Acers also very happy in shade with incredible autumn colour. All of the above offer structure and/or your colour preferences.
Choiysa Ternata is also happy in shade but that is neither structure nor reds/mauves and Clematis Montana will also do fine in North-east facing aspect, but thats a climber. Elaeagnus have lovely looking foliage and neat shapes but not your choices of colour.
That's my garden, I still have a couple of shade areas to plant up and haven't yet decided on the shrub to plant. Good luck