I use page plus cellular on a Moto G4. Uses the Verizon network and I have no Verizon bloat at all. I never had to root the phone either. The Motorola/Lenovo bloat is quite minimal. I pay under 30 dollars a month, but don't need much data.

Just know that MVNOs usually have some drawbacks. E.g. slightly higher pings, lower priority etc.