Suppose we made an RP game or I made a board game or something (those thoughts have crossed my mind before). How would you divide the factions? I'm trying to do it evenly, and I'm not sure if I can do it.

Here is what I did so far:

Good Factions:
Elves
Men of the West (Primarily compose of Gondor and the self-governances under it, such as the Shire and Bree)
Rohan
Dwarves (Includes Dale)
?

Evil Factions:
Mordor
Harad
Isengard (Includes Dunlandings)
Rhune
Moria

So what should the Fifth Faction be? Wild Things of Middle-Earth, composed of the Ents, the Eagles, and whatnot, or make Dale separate, or another Elf-faction, or the "Free Peoples" composed of the Hobbits and the Breelanders as being separate from Gondor, or should there not be a Fifth Faction for good at all, and instead leave things the way they are, or perhaps remove the Goblins, and fuse them with Mordor, since a lot of Moria's Orcs were descended from Orcs from Modor sent to block paths over the mountains, or fuse them with Isengard, since they allied with Isengard later on?