Aside from BTmod's size edits and more lines my inventory screens and various menus look just like the vanilla ones, with the additions of stuff like and a different map image. I didn't want to install all of DarN but I borrowed some formatting from it, as well as using the to make a smaller font to go with edits to fit in more lines on the inventory screens (BTmod does this, but I wanted more! hehe). Actually if you're not averse to editing xml files, you can tweak things exactly to your liking.
And that includes, which required a simple manual edit to make it work with Immersive Interface. If you don't want a really big overhaul, and want to keep the HUD unobtrusive, I use and.