Interesting in this context is completely divorced from morally good/bad. Could be any group from any area at any time in history. I’ll start with a few, followers of the cult of pythagoras, contemporary black Hebrew Israelites, antiracist skinheads and the Amish (neo-luddites in general). Don’t be racist or a prick to other people discussing.
I learned about them after using “skinhead” in a derogatory way to a music buff. That was the same conversation where I learned that ska is actually older than reggae, which is still wild to me.