Don’t know if I’ve hung my hat in here yet, so here goes:

Empire Strikes Back
Star Wars
Return of the Jedi
The Force Awakens

The Phantom Menace

Revenge of the Sith

Attack of the Clones

Haven’t seen Rogue One yet, so I can’t place it. My best guess is that it’d probably land between 4 and 5.

As for the prequels…yeah, I think TPM is the best out of the three, purely for technical reasons. It was shot on film, used practical effects in conjunction with CGI instead of purely CGI, and, at least pre-bluray DNR and digital destruction, it was a pretty film to look at. If you just shut your brain off, ignore the dialogue, and only pay attention to what’s on screen, aside from the CG characters, it is a visually enjoyable film.

Then again, I haven’t actually watched the movie in like 6 years after loosing the DVD and I don’t own it on Bluray, so I could just be blowing a bunch of smoke for all I know.