One eye may well be right, that such trees are best planted on the corners, but they are a bit big to move. Because of their shape I can see the windows of the house, so they are not blocking the view or the light significantly, bushes short enough to go under that window would be pretty insignificant. My worry would be more that they might draw moisture from under the house and cause subsidence, but I can't tell from the photo how close to the house they are. I like Tetter's idea of extending the planting forward, it would make them more part of an overall thing.
Calm down ,Zigs, he is trying to help, he is just a bit tied up in "The correct way of doing things", which we both know is not the only way, if it exists at all.