Hmm Neal, I have some Hydrangea there now. it's too dry for a mop head and the Pee Gee nearby is struggling. A bit further down, the Hydrangea Swan and Little lamb are doing fine.
I tried a Rhodo nearby and it struggled for 4 years. I think the voles were chewing on it. I wanted something taller and not as spreading as an Azalea. There's a beautiful Viburnum Bodnantense Dawn right beside it. I tried 3 Magnolia Little Gems right next to it and the last one is still struggling after 3 years.
Clethra might do the trick. i would love a Golden Rain Tree or a black Pussy Willow or a tree whose name I can't think of that blooms in February.
I'd love a Kalmia there. My one out front died. The voles love them.
i don't know if the conditions are right for a Sambucus nigra.