Rendy! Thanks for starting this post! I love seeing everyone's UIs!
I took some time myself just now to tweak my UI for Legion, some changes I have been needing/wanting to make.
This is not in combat, but I have everyone of my elements (other than debuffs, which show as icons to the left of my health bar, growing left and down) This includes my in combat Weak Auras (turned on for the screenshot), max # of DBM bars, DBM Warning, Boss Frames, Radar, DBM Info, Healing/Damage Meters, Target/Player Unit Frames, Raid Frames (goes from party of 2 to raid of 40 in this same config), buffs both long (icons on left above chat) and short (in aurabar format growing below player frames).
Obviously it would never be max auras/dbm messages like shown, but shows the concept at max utilization.