Philadelphus, weigela, forsythia Jasmine, clematis Rubens pink,,and Cornus are your friends here. All beautiful, vigour growers, easy to care for and prune, and relatively cheap
Double Flowered Philadelphus white perfumed flowers in the summer
Winter Jasmine yellow flowers, summer Jasmine white scented flowers.
Forsythia, bright yellow in spring
Weigela, my favourite, loads of different colours. You can usual buy these in the £1 shop or Wilkinsons .
Clematis Rubemns Pink, rampant spreader in late April to June pink flowers. Hack it back each year and it loves you.
Cornus dark red stems all winter.
If you don't mind a bit of work, then honeysuckle will give quick cover and provide perfume, but can get tangled if left in pruned.