There is no perfect email provider. You cannot provide perfect service to a deeply flawed communication method. Companies like Skiff, Proton Mail and Tuta are good email providers, but not providers that make emails good. Each one has limitations.

These companies should intend to provide you a good service that won't sell you out and make an effort to see the least information they can while following their laws, and they use the encryption and security measures to ensure that. That is what makes the 'Encrypted' in encrypted email important. The end to end encryption for emails is a good bonus but if you're using it for your accounts... it's sadly not worth anything since none of these company sites will bother with encrypting their mail.

PGP is also a usability and implementation nightmare. Encryption should be the default and always.