You have the Kul Tiran Marine for all your military needs.
The Oaken Grove is a Thornspeaker guild
There are probably other kul tiran esque guilds on the sailing theme but none come to mind right now.
I do not think there is a Tidesage only guild atm. I had thought about looking into setting up such a concept for Kul Tiran priests, mages, monks and shaman, but it seems quite niche and I’m not the most confident GM so yeah.
I think the military and druids have clear representation in guilds above, it’d be awesome for the other kul tiran staple: the tidesages to have their own guild too. It’d be carving out a niche however as they seem to be a supporting body that largely works with the other parts of kul tiran society, so fostering close relations with other guilds would be a must.
Also I would like to point out that while we are stationed in Drustvar we are open to any and all concepts, if you are expecting a pure Kul’tiran experience than I point to those already mentioned However we are killing Coven and Drust so if that tickles you fancy…
Forgive me for being lazy but I wrote this a while ago, you may find it useful!
As for Tidesage guilds, there’s no dedicated guilds at this time, though most guilds (namely my own and the Knights of Kul Tiras) do accomodate Tidesages in their guilds.