Be very careful with knockout roses. They are NOT low maintenance. They are the #1 shrub we remove for home owners. They will get up to 6' tall and once they are overgrown the bottom roots will look bare. Your best bet it to find an evergreen shrub you like and use it as the foundation plant that will grow to a height you are happy with. If you want roses then consider the Oso easy (3'x3' max height), Drift roses (2'x2' max height) or the home run roses (3'x3'). Can you show us a photo of the area you are wanted to landscape? Also do you know what zone you are in (what state do you live in)? What kind of sun does the area get morning/afternoon, full sun/part/shade?

A tree's height is not much a concern insofar as "overwhelming" a house. In fact, houses without trees overhead have a tendency to look unprotected, "naked" ... or somehow "pasted" on top of the ground. (Rather, it is the low hanging limbs & branches of trees that make a house seem "overwhelmed" by foliage.) The trees at the left side of the picture frame already do a lot to make your home look integrated into the surroundings. And we see you already have another (what will be a good size) tree at the right side of the picture. I can't see that your landscape is really calling for another tree in the location of the red circle. I think it would seem like too much once the existing tree becomes larger. (But if you were to put a small tree there, I think it would look much better at a diagonal off of the house corner, instead of being set so close to the window.) Consider that the red circle might be a better place for colorful annuals, as a cheerful greeting to whoever enters, and some groundcover since you already seem to have an adequate amount of shrubs. BTW, I'd trim the shrubs in front of the windows lower -- to the bottom of the window.

zone is not enough ... we need a location.. big city name ... do you know your soil??? what direction does the front door face ... are the only shade trees the one on the left .... if there is clear sky above.. im not sure i would even call this part shade .. if this is a winter pic.. do you have a summer pic to see such?? winner winner chicken dinner is done.. more tomorrow ken

It will help to post a picture of the whole house from the street