I have, round the edges from left to right, Viburnum, Cornus Alba, Ceanothus, Acer Variegata, Photinia, Shed, Lonicera (shrubby), Cotoneaster, Spirea, Photinia, Philadelphus, Rambling Rose, The Bride, Photinia, Amelanchier, Ceanothus, Photinia, Cotinus, Euonymous, Photinia, Olive tree, Ceanothus, Eleagnus Limelight, Stag Horn Sumac, Photinia, Ceanothus, Trachelospermum, Forsythia, Arbutus Unedo, Pieris Forest Flame.
Some will grow to 3-4 metres but are all easily pruned if required.