Nice shots.
First, I hope you reviewed your flight plan for safety and regulations. Seattle has a lot of places you can get in trouble for drone flights.
For all those shots without bridge structures overhead, I would suggest you tip the gimbal downward a bit to include less sky and more ground. The sky is pretty with the clouds but not pretty enough to be 50% of your view at all times. This will help your overall light exposure as well, and you will get better details.