Watched Bone Tomahawk recently, I was actually already familiar with Craig Zahler from his novels, especially his two Western novels. His debut was
A Congregation of Jackals the plot of which sounds like a standard Western (a former member of an outlaw gang is out for bloody revenge against his former partners in crime and heads to the wedding of one of them with gunmen in tow) but is a very gritty exercise in the genre. After that came
Wraiths of the Broken Lands which was later described by Zahler as being like Bone Tomahawk times 10, members of the Plugford clan, as well as some others they've enlisted to help, cross into Mexico to rescue two women of the clan who were kidnapped and forced into prostitution at a brothel that caters to well-off and depraved clients. It doesn't feature any troglodytes or anything, but it does get pretty horrific.
While I think Bone Tomahawk is a great Western-horror piece and just great horror in general, one of the more horrific things to result from it was this Letterboxd review, which was part of the reason I stopped visting Letterboxd because every other review was becoming either zany one-liners from people trying too hard or long essay posts on why, say [x] was all about toxic masculinity or anti-colonialism, or this one particular user being just one example, rambling schizo posts that were encouraged by other posters.