For the former, Apple is the way to go; so far they haven’t done anything privacy-hostile and I personally trust them.

However, they do still have a lot of “cloud” services (including some that send data back unexpectedly, like all your email senders & call history even though there is no explicit toggle for it in the settings) so if you’re more for the latter then maybe an Android phone with good support from alternative operating systems (LineageOS with OpenGApps?) is a better option.