I take it you have regected my analysis of data? Thou stick in the mud!
LMP, are you dealing with these entities as people, or people groups? Are 'Ents', 'Goblins', 'Hobbits', and 'Elves', waiting to be fleshed out, or are you planing to keep them that way?
Because I don't think you really can. Balrogs come in all different shapes and sizes. Same for pretty much ever other race. I realize that will make your job allot harder. Or are you shooting for a more general overview of a certain race?