For email, I landed on Tuta as being the closest in feature parity and signed up for the €3/mo plan. Been pretty happy so far and was pleasantly surprised to see both the email and calendar apps were available on F-Droid. Personal bonus for me was they also run on renewable energy.

So far the only con I’ve found was lack of support for +aliases (e.g. name+alias@tuta.com) but the 15 additional email addresses help to offset that.