I wanted to draw attention to the fact that while there is some variation on appearance and especially in the hairiness of the face, some common features do stand out. One is that most are basically human-like and the placement of the eyes, nose and mouth are always pretty consistent. Although it ios not always shown as such, the brow ridges are often of the characteristic double-arched kind that the Neanderthals had, and there is generally some degree of forehead showing (Although hair can fall in front of it). Also the brain case is fairly large and is often curved, domed, and bulges up on top. If there is a peak to the top of the head it is usually in back vertically behind the ears. The ears are ordinarily small and the mouth is ordinarily wide with big teeth. The eyes are often very large and very dark, and contrast to normal human eyes.
I think we have sevaeral indicators placing this series as close to the Neanderthal and Heidelburg types of fossil humans anatomically, and hence they assort with the ancestors of modern people. This means that they are basically hairy people and there is no especially big mystery to it. There is no new species to be discovered here, unless in the future some expert decides the sense organs are sufficiently different to warrant such a decision. That is not a determination which has happened yet and so for the tie being they remain simply as hairy people.
Above, early-Classical period representation of a Satyr or Wildman from Italy. Below is a sensationalized newspaper illustration of a Wildman carrying off a woman. The facial features of the same type and so is the shape of the head on top, which does form a slight rise in the back but does not form a steep cone shape.