I've been trying to get more and more minimalist, this is what I'm looking at right now.
The far left is Pitbull raid frames. I've tried to make them small, yet visible. I wanted to see the names and the mana of our casters. Below that is Prat, simply used so that I can copy and paste from the chat box as need be. Tiptac is my tooltip, located in the bottom left corner, I have it set to be fixed in that corner, I'm debating placing it in a different location and my raid frames in that corner instead. In the top right my buffs are setup with Satrina's Buff Frames; the buffs go horizontally while debuffs are larger and go down the screen vertically. All my scrolling combat text is Mik's Battle Text. The icons in the center of the screen are Power Aura, the red x-hair is for Lock and Load procs, the green aura means that Serpent Sting is not on my target. Bartender 4 is for my buttons, in my minimalist nature I only have images with Omni CC to tell me when the cooldowns are up. The pet bar is located at the bottom center of my screen so I can check pet cooldowns, and that autocasts are properly set. I have little aspect images above my health so I can quickly see what aspect I am in. In the bottom right I have all the things I click (buff food, mounts, bandages, etc.) it has a mouse over transparency so I can view them better when I'm going to click. Recount is on the right of my screen, Omen 3 appears above it in a PvE raid situation. Quartz is what I use for the timers under the auras. It tells me the time left on Serpent Sting, Explosive Shot tics, etc. There is also a swing-timer for auto-shot in between that. Sexymap is my map addon, used mainly for aesthetic purposes.
So to recount the visible addons:
Bartender 4 (skins from Button Facade)
Mik's Scrolling Battle Text
Omnic CC
Pitbull
Power Auras
Prat
Quartz
Recount
Satrina Buff Frames
Sexymap
Tiptac