We have a couple of Pee Wee Hydrangeas in our compact front entry garden, which is part shade. They are the dwarf form of the big Oakleaf Hydrangea, and are not too easy to find.
I highly recommend them for shrub/perennial borders. Like everything else, they take several years to reach their full size (which is around 3'x3' or 4X4). Ours are in full bloom right now: