Here's my layout. Nothing too fancy. It works with every class/spec/role. I've tested it on everything, both 110 and leveling characters. It's got info you need, without a ton of extra. If you're a hardcore raider/PvPer, you might want more, but this will work well for everyone else. You'll need to download ElvUI as well as ElvUI Shadow & Light. Make sure to unzip those before GeekFan UI. I have added SharedMedia to handle the fonts so everything matches.
Now have 2 layouts available. Mostly aesthetic changes, both coloring and layout. Make sure to do the Initialize step in the installer as you'll likely wind up with a mish-mash of both layouts if you ever want to switch between them.
Recommended Addons:
Big Wigs
Little Wigs
Details
TradeSkillMaster
Included Addons:
Addon Skins
Artifact Power User
CleanBossButton
Deja Character Stats
Order Hall Commander
Pawn
Quick Quest
SharedMedia
World Quest Tracker
Thanks to Blazeflack and Benik for helping me get the installer sorted out.