Beginner Gardening: Backyard Landscape around Deck, 2 by MKML30

MKML30 wrote:
Our very large curved deck needs landscaping. This is what the landscaper suggested: PINKY WINKY hydrangeas along the curve, or ninebarks. I made up pictures to show you the rest of what we are doing. Also need suggestion for corner cove, as you can see in the pictures.
Deck gets morning sun. Will be putting lilacs to the left, out of the picture and a group of trees to the right of the deck for privacy. We have complete privacy in the back.

So, what to put along the curve and in that corner?