I had the same problem a week ago and it almost led me to deleting my character. Same as you, tried unstuck, in-game commands, deleted Cache, WTF folder (which also broke my client and had to copy the folder from my friend), Hearthstone, summoned by a warlock - nothing helped. People said I was standing right in front of them in Orgrimmar, but on my screen I was under the textures in Stonetalon Mountains. I waited for a GM for like 2 days until I thought of the only thing I hadn't tried - getting myself killed.
My friend summoned me next to Gamon, I taunted him and he killed me. After I clicked Release, everything was fine. So try to kill yourself in whatever way you can think of - Gamon, an ally char or something else. :)