To me, it is too busy but lacking heft. I would do a solid bed of Liriope (it looks like that's what you have up front.) It would cover enough of the wall.

That makes sense. The day lily was just dropped in there for kicks after it seemed to die almost completely in another location, so I just put it in there last year to see what happened. Now it's doing amazing, but needs moved. The black lace elderberry is now so mature that it's out of control and needs moved since it's on top of the spruce and hydrangea. So yeah, it's a busy mess. Thanks for the suggestion!

Forgot to add pic.

Nice! I'll see what my boss (wife) thinks about this idea. I kinda like it, even if it's pretty overloaded with green.

Any suggestions then for something taller? That's what I had hoped for originally, but the shade aspect definitely seems to play a role in what will grow there well.

Maybe go see what local retailers have, that you might like. If you go to an independent operation during a less busy time of the day or week you should be able to get questions about anything that catches your interest answered.

Grass is usually a sun plant which is why yours is flopping. Try a shrub that reaches the height you want or a vine on a trellis. What to suggest would depend on amount of sun and when it occurs.

Only morning sun, and even then it's kind of shaded by the tree.

A specific reason to go look at possible candidates at outlets (instead of trying to get someone here to tell you what to plant) is if you are going to make your purchases locally what local sources that you use have will determine what you end up with anyway. Otherwise you may discover at least some suggestions made here are not present where you shop.

If it gets at least 5 hours of sun, consider a summer blooming clematis on a trellis. Then you can cut it back for the winter and still have the trellis as an ornament, perhaps with lights twined onto it.

Hydrangea Tuff Stuff is about the only big leafed Hydrangea that is hardy enough to bloom for me, and it is very consistent, blooming every year I have had it.

Some of the Viburnums are happy in a fair amount of shade, but you would need to avoid the types that are particularly susceptible to Viburnum beetle. Cornell has a listing of those that are most and least vulnerable.

You could choose a Rhododendron, either evergreen or deciduous. Besides the spring flowers, the deciduous rhodies often have nice fall color and the evergreen ones will give you a winter presence.

Consider adding Japanese Forest grass behind the Liriope:

https://www.gardenia.net/plant/hakonechloa-macra-All-Gold-hakone-grass

I actually love Japanese forest grass. Probably not a ton of height, but since it tolerated the shade maybe a ton of it would work. I will be reliving the day lilly, maybe moving the willows and elderberry too because they are crowded, but the forest grass could be a good option. Thanks!

Northern sea oats, aka Chasmanthium latifolium. Some people have problems with it seeding out too much. I don't at all.

If you still want a tall grass, Calamagrostis brachytricha handles shade well.