I’ll also cast my vote for Hal9000’s edits for all three movies. Stellar work across the board – seamless transitions, better pacing, and some really nice changes to certain characters (their motivations, their fate, etc). I really enjoy watching these three films now thanks to him.
Some alternate mentions… Seciors has a solid edit of Ep I, which I would recommend to those looking to “get through” Ep I as fast as possible. It’s moves at too much of a break-neck pace for my tastes, but it’s still put together very well. For Ep III, L8wrtr has a really good edit as well. There are a few things there that I’m not a fan of, such as the order of a handful of scenes (Anakin makes sudden jumps back and forth between locations with the way certain scenes are ordered). But if, for example, you’re not a fan of Hal9000’s change to Padme’s fate, then L8wrtr’s version would be a suitable alternative.