Shrub for Corner
One of my current faves is the Ninebark. They get little flowers in spring, are nice and lush all summer, and in fall they are the most gorgeous colours going (the one I had was red, green, yellow, burgundy in the fall) and the leaves tend to hang on (and I'm in Alberta where we get winter so that's a bit unusual). They also get some dark berries in the fall. It probably varies by type, but take a look. Also they get fairly big if left. The one I had at my last house was probably 6' X 4' wide. They are very hardy and don't require a lot of care.
Another that is good for colour is Barberry. Very hardy and comes in burgundy, lime green, or a gold. They also grow very large and have some nasty thorns but are gorgeous. I have the burgundy Barberry next to Golden Elder and two really set each other off.