I’m not a developer but I have done quite of bit of research on the subject. Mullvad and IPVN are at the top of any list of VPNs that truly respect privacy. Both are very active in educating users and offer the option of paying for services in cash.
Also consider using Qubes OS if you are serious about your privacy and security. Purism makes one of the best modern laptops in the world for running Qubes.