Since this is a 60 page thread, so instead of pouring through each post to see if any of these were mentioned, I will update these based on whats on the OP.
In Mogu'Shan Vaults, the Stone Guard quillen are all tameable. I was able to sneak in and tame them to confirm. They are still the adorned versions, so same as Portent. I can provide screenshots for proof if no one believes me
Beast of Jade in the Greenstone scenario still untameable, even when solo queued.
Wulon's solid green quillen adds are still tameable but still controlled. Wulon himself still turns gray when tamed. I don't remember the trick tame that retains buffs or if it still works anymore so couldn't try that.
Tested various kunchong, mushan, stag and yak just to see. Still no dice. The cloud serpents on Shan'ze Dao still have a diet and are still untameable.
Edit: Did some Eagle Eyeing in Talador for the beast list thread and found this beauty, man I hope it can be tamed:
LINK