Someone on IMDB asked the director, S Craig Zahler, about how big Matthew's role is in this.
Zahler replied that "
Matthew Fox has a big role in the film and gives a terrific performance."
Also, Bone Tomahawk will be shown at the Popcorn Frights Film Festival in Florida in October.
https://www.o-cinema.org/event/popco...bone-tomahawk/
Thanks to Fate815 for finding the quote and the film festival info