I have been using Mullvad for the last few years: https://mullvad.net/en/
I don't have much to base it on but they seem trustworthy, and I've seen them recommended here before.
I don't have much to base it on but they seem trustworthy, and I've seen them recommended here before.
Other than the letter I sent from Morocco, I never included a return address.
https://mullvad.net/en/account/create/
That link automatically creates a new account. No names, no email address (except if you set up a PayPal subscription), not even a password. Your account number is literally all you need. They even have a FAQ that provides a generalized database schema.
https://mullvad.net/en/help/no-logging-data-policy/#numbered