Am I too late to join this party?
The others are right about needing to know the general area where you live. But, even taking a broader approach, this would be my suggestions.
I was trained that beds need to be 5' deep. That allows for a plant behind and one in front. Perhaps an evergreen in the back and perennials in the front. Your bed needs to be curved from the front and around the large pruned evergreen that you have. Make your curves gentle and you could plant some blooming perennials around the shrub. If you really would like to be industrious, then bring the bed out in front and capture the tree. You could then start your background planting on that side of the house and curve it so you see a lot less of that other driveway.
Sketch it out and take it to a NATIVE plant nursery. NOT one of the Big Box stores. Get native plants to go down and you'll never regret it. That nursery can make some suggestions and it would be easier to discuss their suggestion of plants if you both can be looking at a sketch of that area. Just indicate North, or better yet, East or West so they know how much sun/shade those areas get. Native plants know the soil, the weather and can adapt very quickly. Fall is the best time to plant. you can add some color with the second layer by adding salvias as an example. First, you might want to continue amending your soil. You get only one chance to do that and it's not after the plants are down. If you are apprehensive about their selection of plants, then write them down, take it back home and Google all of them. Then sketch in the mature size of your plants so you have an idea of how large of an area they will take. But, that native nursery should be able to steer you very well. There are native evergreens everywhere across the US.
Then, after you get your beds in, I'd consider planting the window trim white to set it off. Just a thought.
I do hope you post your AFTER photos. Enjoy yourself. Don't let it become a chore. With a gray house, everything will add color, even analogous. You'll do just fine.
Good luck. This is an easy fix.
