I'll admit I've dismissed them all as mumbo-jumbo but please correct me if I'm wrong - not eating cows (hinduism?) despite being a suitable source for protein seems pretty limiting. Living in celibacy with an odd haircut (Buddhism) is downright weird to me. Sihks seem alright, although those turbans (the name escapes me) seem oppressively heavy. Do you have any other religion in mind that isn't a tool for oppression?
Edit: Sikhs are warriors with swords as part of their uniform. Doesn't get much more oppressive than war. Scientology extracts wealth from the members to keep the leaders happy. I don't know of any "concepts and ideas" religions. Please feel free to enlighten me.