I like the idea of the 4-5-1-2-3-6 order. I also like the idea of the 4-5-part of 6-1-2-3-rest of 6 order. I think an awesome fan edit could be done that cuts back to the PT at just the right spot and plays through from there. Either cut in ROTJ right after Obi-Wan and Luke talk about his father, or cut somewhere else.

Another idea, that others have mentioned, would be cutting everything after Anakin "dies" so we don't see him or Palpatine after that. Cut Yoda saying goodbye to Chewie. I don't know if you could still show him lifting off or not, even though it doesn't really matter. Leave everything else with Yoda and Obi-Wan and let ROTS end the way it does. Reincorporate the scene with Yoda landing on Dagobah so we know he ended up there. Then we don't see Vader until ANH (just echoing previous statements).

That would be awesome!