My answer is basically the critical consensus: Empire and Hope are good, Return and Awakens are at least okay despite some flaws, and the prequels are garbage.
My only contrarian take is that The Phantom Menace, while still pretty bad, is a whole lot better than either of the other prequel films. I'm pretty sure that it was someone here - maybe Gully? - who helped to convince me of this.
Ftr it wasn't me. I would never make such an argument - because that would require me to think about the prequels more than I would want to.