Proton Mail is good, just don’t use the paid version of any Proton service. The paid version will delete your email address if you don’t keep up with payments.

You can get a lifetime subscription to Proton Pass sometimes, and that’s what I did. I suspect that may protect my account from deletion due to inactivity if I’m picked up by ICE or hit by a car and put in a coma (just examples, I’m not American). I’m not sure if it has that effect though.