One of my favorite buildings, the Weyerhaeuser (paper company) HQ in Federal Way, just south of Seattle, sits well and integrates with the terrain around it:
https://www.google.com/search?q=weyerhaeuser+headquarters&so...
https://www.google.com/search?q=weyerhaeuser+headquarters&so...
the gardens are also worth checking out if you are in the area, the entrance is right near the bonsaid museum entrance.