Thanks for asking. I am looking for a new provider myself. I am interested in people’s suggestions.

Personally considering using my own domain this time. Take a look at Proton Mail, and Fastmail. Namecheap has mail too and you can buy domains there as well. None of these are free but that is the price of being the customer not the product.

It is also possible to get a business account with Google which presumably they would not data mine. I would verify though.