Too Long; Didn't Read
An open source version of Android removes all of the Google Play services that perform tracking and other services. CalyxOS gives you a good mix of security, privacy, and features. Zoho Mail seemed to check all the boxes and I've been pretty happy with it so far. ProtonMail focuses on privacy and security. Heycamp provides a fresh take on email and is really cool, but Heycamp isn't focused on privacy, I'm 99% the company that built on email, it would never sell your data.