Return of the Jedi has a great final act, but is a bad movie overall. Bad effects, bad humour, not much in the way of new story, and just general ridiculousness (Luke Skywalker, Jedi Knight, can't get out of a net).
Revenge of the Sith might just be the best third act of all the movies, because it was planned out and the trilogy really built to it. Unlike Jedi, they saved a lot of story for part three. Rise of Skywalker was enjoyable but they crammed a lot into it and one never get the feeling they were planning what happened (bringing back the Emperor was okay, but should have happened by the second movie at the latest).
I enjoyed Solo, the dialogue and story were generally enjoyable. It just feels a bit by the numbers, like they were working from a Han Solo origin story checklist.