[sixdimensional]

I like Fastmail with my own domain for personal email, but the reality is nothing is a complete replacement for a Google account, given how tied in it is with auth and the whole Google ecosystem. I still have to use Google for work.

Proton is another one people often suggest. Hey.com sometimes too. No experience with those myself.

There are other options (such as the big guys, iCloud mail or Outlook.com), but aside from self-hosting (which I don't want to spend time maintaining just for my personal mail), I personally haven't seen much outside of those ones that are recommended often.