I designed this foliage-driven planting scheme for a client in NE Portland, Oregon and it looks good all year. At the time the first photo was taken, its interest is solely derived from pleasing constrasts in the texture, form and color of foliage. While there are floral players that come into play at different times during the season, they're considered a bonus, as in the addition of Echinacea 'Sundowner' and an annual purple fountain grass (Pennisetum 'Rubrum'), which provide bloom color and movement to this scene later in the summer as illustrated in the second photo.
The foliage-driven planting in early June
A close-up view a couple of months later in mid-August.