Gorgeous Azaleas!
When we first moved in, there were 5 blue spruce trees crammed into those little beds. That made for deep shade and really dry conditions which made it nearly impossible to grow anything there. None of the spruces were happy, being so overcrowded and in the shade of the maple, so we removed all of them. That helped out a lot, still quite dry, but at least the area gets a nice infusion of morning sun now.
I've found Helebores, Toad Lily, Catmint, and hardy Geraniums to be great performers under those conditions. Now that there's a few hours of sun in much of the area, Lilies and bearded Irises are working out well. I added several varieties and sizes of bearded Iris this year as I was dividing rhizomes. Callas (the Z.rehmannii types that often have spotted leaves) have done well too. So far, so good with the Phlox that I've tried there, they do need some supplemental water, but they deal better with dry conditions when they're in shade in the afternoon. Hostas do ok there, but prefer more moisture, especially when getting established. I'm also trying a few Daylilies in the sunnier areas, they're great for tolerating unfavorable conditions. Late summer is the most difficult time to have anything looking good there- seems most plants that bloom now (aside from annuals) prefer sun, and shade tolerant annuals usually want lots of moisture. That's why I use containers here and there throughout the area.
This part next to the house seems to hold moisture, so I have ferns, bleeding heart, Filipendula, Periscaria 'Red Dragon', and hardy Begonias growing there. Black and Blue Salvia is loving that spot too, which surprised me since it doesn't get a lot of sun there.