The ACW Kickstarter "Natives" Faction looks promising if using it for the IHMN Apache Company: although they look more generically "Plains Indian" rather than Apache, they have the advantage of not being armed with firearms. Plus the Living Totem and Brother Bear would make good Demons/Lesser Demons. I'm interested.
There are some other useful minis there as well for add-ons: Coil Projector, Electromagnetic Barrager, MASS m1861, etc.
If you're able to create an entire Company from the ACW figures, their scale is less important than if you're mixing different manufacturers' figures within the same Company, as we so often have to do.
Plus the Henry's House is a sweet piece of work, if a little pricey.
Mike O