The only exception I have found recently is EU Zandalar Tribe rPVP Horde. The started gaining steam fairly recently and seem to be going pretty strong with multiple 5box & 10box teams at cap though I think multiple members have recently caught alt-itus &/ real-life-itus slowing things down... I think the largest raids they have actually fielded so far are 15-20 so time will tell if they actually start doing 40mans.