I might not be the only one who's been thinking all the monstrous humanoids, orcs and goblins and whatnot, have been really overused in virtually any fantasy even remotely inspired by D&D? These little fuckers are swarming everywhere, even though most of the time very little of value would be lost if you were to simply replace them with less civilized human tribes: roving barbarians, jungle savages, wildmen of savannah, pygmies, and the sort. It rather cheapens the whole fantasy thing and makes them commonplace and mundane and boring.
A lot of times (in many OSR blogs) the first solution seems to have been to refluff them into something weirder and more alien, but I'm taking a far more simple approach: leave them as they are, just make them far less common.
Each particular monster was spawned by a different deranged wizard, demon, fairy queen, ancient dragon sorcerer, super-advanced bio-engineering alien, or whatever other fearsome menace hiding somewhere in the dark corners of the world. Some others may have spontaneously popped into existence from the caves of some mountain range or another, and still day there in the dark to this day. Maybe a few are a remnant of a previous lost age. Whatever their origin, their reach is a small one and they rarely rise to bother the humans much. They bring with them the darkness of the earth, or the will of some demon lord. They're unknown, and therefore feared.
We've got orcs, goblins, hobgoblins, bugbears, gnolls, kobolds, ogres, lizardfolk, minotaurs, trolls, xvarts, tasloi, bullywugs, maybe some giants, bunch of undead, and then a big pile of even more obscure or homebrewed creatures. That's a lot of weird shit to hide in the forests, the mountains, and the wizard towers and castles. Plenty to occupy myself with for a good while.
What do you think? Am I on the right track or should I turn back and go down a different route? Maybe got a more specific idea or two on the origins of some type of bugger?