I can recommend the "Machete" order: 4 5 2 3 6 (omitting 1).
The Machete order puts 2 and 3 between 5 and 6 to create a "flashback origin story" of sorts for Vader, and then concludes with 6.
I wonder if there is an order plus fan edit that makes it look like the reason Ani turned Darth was because of Ashoka leaving the order?
Like New Hope, Empire, select episodes of Clone Wars, edits of Clone Wars and Revenge to remove Padme (can anything from Ashoka series be inserted?), then RotJ.