It's better, but you would likely be better served by choosing an unlocked, unbranded phone. Untouched by both carriers and deals.
See the Google Pixel and other manufacturers with close-to-stock Android like Moto or BlackBerry.
Anyways, third-party apps can all be uninstalled easily. But they will be reinstalled upon a hard reset.
Most core apps cannot be uninstalled. OneNote, etc. are here to stay.