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I used a solid background color so you would see nothing but the UI.
I was in a 5 man dungeon and you can see the unit frames in the top left. As hunter, I do not need to have them front and center, so I keep them small off to the side. The player frame is showing with the pet bar directly below it. You can see the target frame and then the target of target frame to the right of it.
I have my focus/energy bar right above my main action bar in the center. I also have 4 colorful bars below my main action bar, that is the addon NeedToKnow and I use it to track my dot's and cd's.