My zone is 7A (northern Virginia)

My townhome backyard is bordered on the other side by another row of townhouses, so my backyard is like sandwiched between 2 rows of townhouses. My townhouse is not an end unit either. My backyard does not get an direct sun (except perhaps when the sun is directly overhead - which does not happen on most days) in the sky. Otherwise it does get some reflected sunlight from the walls of the bordering houses.

When I moved to this house, there was already pretty good sized american holly (besides grass) growing in there.

What i want to do is grow some trees in there. My top choices are

a) Princess Diana Serviceberry

b) Oaklahoma redbud

c) American hornbeam

d) hop hornbeam (ostraya viginiana)

e) Carolina silverbell

f) cherokee princess dogwood

I would like to pick 2 from the above (if there are any other better trees out there , please feel free to recommend)

I am a newbie gardener . Can anybody growing trees in a shady spots give any suggestions or recommendations ? It will be highly appreciated. Thanks.