There are quite a number of eastern philosophies, many of which pre-date Taoism. All of which are worth some study, as are some so-called ancient western philosophies too. Paganism for example.
"Paganism" isn't a philosophy. It's just a catch-all term for basic unstructured traditions. It literally means "country dweller". Something like "bumpkin" or "hick", i.e. a person who hasn't yet savored the enlightenment that is ass-umed by the user of the term. It's an exercise in elitism, or if you like, an exercise of arrogance..
"Heathen" is the same thing, only more specific in what kind of country the degraded person inhabits based on its natural flora.
The "paganistic", i.e. ancient traditional motifs of Europe, which are probably the ones we know best and to which the term is generally applied, had a much more wholistic and animisitc world view, and as such yes are worthy of deeper examination.
Arguably these were chased away, buried and sent to the despised class of "paganism" with the advent of monotheism and the concept of a male god, a concept which, if we think about it, is absurd.