I think the thing you’re going to struggle to find is the rolling system. The few guilds I know who have one these days are Alliance side.
If you’re willing to forgo that - Red Venturers might be a good fit. They are adventurers who often work with the Horde military so you get a nice mix of event types from DM’d, to free form, and of course some RP-PvP on occasion.
Though that isn’t the bulk of what all PCU guilds do, contrary to what you might hear!