nostr:npub1y749ew2wfqfydazhmy9xj0qegvfkn8qlrm3grc8x2u3lplcxufds6zgta6 nostr:npub12dxt6c00ru2nslyjyrt8mefrkhctvnqt9pkncmjm83g4wldwwvssp4tug5 nostr:npub1wc2kznjw6kldwzz8eedr9pf208waa8ww3fjsqk0nz4rdv8q663qswt4sk7 I wouldn't trust ProtonMail either. It has a lot of red-flags such as requiring you to store your private GPG keys on their servers. There is no reason to require that unless they want to be able to read your email.

I would recommend Posteo for email. They accept anonymous cash-by-mail payments (only 1 EUR per month) and allow you to generate your own keys client-side. That or you can try cock.li if you can get an invite. They do offer a few SFW domains like airmail.cc and firemail.cc. The other option would be to host your own email server, but that's out of the scope of my ability, so do your own research if you want to do that. 

Granted, you shouldn't fully trust any email provider or VPN. You have no idea what they are doing unless you have physical access to their servers.