One thing I like to do is reserve the bacon grease and use it in place of part of the butter. As long as the total is 2/3 cups of fats, you will be good. The bacon grease just adds a ton more flavor.
If you want to fancy it up, reserve a bit of cheese, bacon and green onion tops and garnish the bowls with them. This is literally my best baked potato soup recipe and the one I make when the day calls for a hearty soup.