Basically, any religion that considers gods uninvolved with human affairs, so they don't care about our obedience. Here's a start point: https://en.wikipedia.org/wiki/Nontheistic_religion

Naturalistic religions, so called "paganism", also worshipped living beings or natural phenomena like a particularly big tree, a mountain, a forest, the Sun, etc. Some of these didn't demand obedience nor spoke through a ruling elite. Bonus points for worshipping things that could be verified as real.