Shade Gardening: Help me plan my plantings for this corner shade garden, 1 by Weerobin

Weerobin wrote:
And one more picture - I didn't have an Aureum to post, since mine is on life-support after acourtesy of some of my deer friends. I think he'll survive (happened a couple years ago), but still awfully mangled.
Here's a related maple, shirasawarum Autumn Moon. It's not nearly as golden as Aureum, but it's a more robust grower. I like the colorful seeds in the spring. It's even prettier with Aureum, since the red seeds contrast vividly against the golden leaves. Such a pretty tree!