Giving EndMaster his own category would, most importantly, show a portion of the recognition he deserves.
Additionally, it would benefit readers by making all his stories easy to find, making it easy to sort then all in a way other than alphabetical, and highlighting how they are all wonderful and should be read.
It would also be very appreciated by many of the fantasy authors on the site by making it so that they are not all competing for three spots instead of the usual six. This would allow other authors to get greater recognition and increase the motivation for some.