aruncus "deutschland" gets more sun than "horatio":
A couple "Goats"
Here is Aruncus 'Guinea Fowl' a nice well behaved short hybrid variety. Here it is growing in deep dry shade under a cedar tree. The leaves are only about 16-18" tall. I like it because the foliage is always pretty. It never looks ratty or dry. Then for 6-8 weeks there are these lovely drooping white flowers. Due to the shade, they droop a bit more than I like, and aim out toward the light. I should try it somewhere less shady too.
Here it is today, now the flowers are starting to get yellowed and more droopy but they were white for a really long time. When they were white they played off the grey Hosta leaves prettily. I never tried the tall kinds, this is the only one I have.
I love that photo 'robin!
Full sun on our property is in short supply and so that is why I stick ours in the shade.