Have you researched Oakleafs Sikes Dwarf and Pee Wee? While taller than Pink Elf, oakleafs can take slightly more sunlight. But these are still hydrangeas so make sure the amount of afternoon sun in the middle of summer will not be an issue.

Sorry that the fourth one did not make it. If it got too much sun, the leaves in direct contact with the sun would have turned completely yellow or white-ish, including the leaf veins.

Yellow and white? It turned brown, despite daily waterings to ensure that the soil stayed moist. Maybe I should try again, though I'm hesitant to throw another $30 down the drain...perhaps a the varieties you suggested.