I’m not too knowledgeable on the mercenary scene on Alliance anymore, but I know The Bloodied Goats are around and are a good bunch. Couldn’t find a forum thread for them, but they do have an Argent Archives page: https://www.argentarchives.org/node/191957. I can also wholeheartedly recommend Hand of Conquest if you’re looking for a fun Horde guild, as well as the ones Kharaas linked above for a more troll-focused experience.