Would it be possible to get a feature similar to "Fit best and maintain aspect ratio" but for a smaller area on the screen?
I have attached an example of how it looks. It is the image in the middle with white around it. I want to be able to maintain this look even with larger images.
It sounds like you want to confine the wallpaper images to a smaller part of the screen? You can kind of do this by shifting the image using the image offset feature, but it won't be perfect. If the images are all 1080p and so is your monitor it should work the way you want.