Proton is the way to go and they have almost all bases covered these days.
The second best way to spend your Bitcoin is to get a nostr:npub1mea2vwcu06qf7e4x00wd902vj54qnn2jacq76ldntrgfhtvhlpqqrvqane account. I was skeptical at first, even complained about their free product making it a bit annoying to use. After I got a paid account, I became a Proton Mail maxi. It's such a good service and its really becoming an alternative to the Google Suite.
Discussion
And the rumors about their coop to the govs?
I think it’s mostly BS. They still do have to obey the law, but they have put themselves in a good position to really minimize what could be given up if forced.
No rumors. They publicly say they've turned over everything they have. They don't have a lot if you don't give it to them.
Everything they have is some metadata. There is not an email company in the world, I know of at least, that will not comply with the law. They still don’t have your keys. There are a handful of companies out there doing their best for privacy while still trying to not break laws or get themselves in trouble and everyone likes to tear them down, it’s a bit sad in my opinion.