Fatsia japonica 'Spider's Web' - This new fatsia is primarily grown for its handsome foliage, which looks as though it has been variously been dusted with icing sugar. It makes a wonderful specimen, particularly when planted near white-flowering plants that compliment the leaf variegations. It can also be used to help add light and colour to areas or lightly dappled shade.
Pieris japonica 'Flaming Silver' The other two near the Kerria are Pieris - I wasn't certain. Not sure which cultivars you have, but it looked like they were happy were they were. Not suggesting you move them, just thought you might want the name.