It might not be exactly what you're looking for, but here's a quick mockup in UIBuilder. If you like my mockup, I will continue to develop a full modification. I can make this pretty customizable with a settings text file included (so you can have your own preferences), but nothing as crazy as WoW. I'm just talking about pretty much changing each groupmember's cell size and removing the mana/pet bars & detrimental effects if so chosen.
EDIT: Here's a better picture using my custom progressbar image
