hands down i would have to say undulate trigger (Balistapus undulatis). i've seen one take on a clown trigger twice its size. but i've never kept a queen or blue line.
I would say a blue Line trigger hands down would be the most aggressive. I have been told some time ago from the local wholesaler that they will kill everything and anything. They used to keep them with all the outhetr's when they came in (titan, queen, undulate, huma) and all have been no match for the blue lined trigger