Well, there are plenty of legendary warriors in the WoW lore, dead and living. Perhaps it could have been some kind of a new military force, to which representatives of all races and cultures would've been brought together. Warriors would be the leaders and the main force of the newly formed army, and of course you could then have quests where you go recruit healers and ranged units to that army as some flavor to top it off.
Or, it could've been something simpler, built around more of a gladiator style -setting, a place where the best warriors would congregate and fight each other, and then through some plot an army would start to form, with those best warriors leading it. Think Spartacus with Crixus at his side and so on.
Or maybe just look at how fighter's guilds have been done in other games, like Oblivion for example, and take some pointers from there.
Thankfully, I'm not a game developer, but if even my addled brain can come up with ideas on the fly just like that for warriors that would actually have to do with WoWs warriors and Azeroth, then I'm sure the amazing developers at Blizzard could do better.
But instead, they went with vrykuls, and now at least half the warriors hate the idea.