Gmail is shit. Gmail is Email Extraordinaire but if something goes wrong and you lose access, good luck gaining it back. Try to call somebody. This, and all the privacy issues.
For a moment I thought this would be a good use case for federated authentication, but who would you even trust to run that securely?
They sell email for your own domain (you can also buy a domain there): https://www.infomaniak.com/en
Bonus: Based in Switzerland, no EU or US jurisdiction.