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.
The Free Zone folks.
Basically, they’re Scientologist Lutherans. They love the teachings of Scientology and the works of L. Ron Hubbard. They’re fully onboard with all the wacky Scientologist beliefs and practices. But they think the church itself is hopelessly corrupt and shouldn’t be followed. They believe everyone should be able to read about Xenu without having to pay the church a bunch of money.