I'm not aware of the controversies regarding ProtonMail, yet they're my main email provider. I have one main email for everything, and an alias for public-facing email. ProtonMail has a free service called SimpleLogin that allows you to create on-the-spot email for a specific service (even comes with a browser extension). I don't have anything else regarding emails, those two services really cover all my bases.
I'd be interested to know which controversies you're referring to though?