Hi Grumpiest,
I’m the recruitment officer for a Horde guild on Thrall named Assault. With the changes coming next season, though, Horde or Alliance won’t matter as far as guild affiliation is concerned 
You’ll also be pleased to know one of our GM’s goes by Grump, so you two I imagine will get along really well 
I’ll share our guild spam below, it has my BNet info if you’d like to reach out to possibly discuss a trial.
Best,
Liim
https://us.forums.blizzard.com/en/wow/t/assault-aotc-guild-thufri-evenings-lfm/1540589