We have the Uncharted Isle guild hall, and all the trader NPCs available from the guild lord are unlocked. The Henchmen, Xunlai Agent, and Chest are to the Guild Lord's left on the platform above the pool, and the Guild Emblemer, Canthan Ambassador, Festival Hat maker, and Priest of Balthazar are to his right. The remaining merchants and traders, as well as the Luxon/Kurzick NPCs, are scattered around the perimeter of the pool in front of the gate.
You have a guest invite.
If you are unable to accept the invitation before it expires, I have uploaded a short video
here showing their placement. It's only 45 seconds, but the file is almost 54 MB. The text is already fuzzy; I didnt want to risk illegibility compressing it further.