The closest thing to clean install is Ameliorated AME or Atlas OS. Check that out if you really need windows.

This. Trusty old lawnchair2. I can group all my apps in folders and have a separate menu for island/shelter apps.

Just use a second phone for that proprietary stuff. So you dont have to comprise privacy/security on your main/private phone. Also a huge fan of xprivacylua to isolate proprietary apps and feed them random data.