It would be cool, but it would definitely be harder to make them sympathetic to the audience. Like making a movie where the Waffen SS executing civilians are the shiny heroes.I would prefer full on loyal, not renegades (loyal to the idea renegades are overdone).
One could show more of the Imperial Army (if it even exists in the current canon), which is a much larger and much more "human" army in ther imperial military, mostly for occupying and peace keeping. There it would be much easier to have sympathetic figures that are loyal to the Empire (like it's much easier to show "good" Wehrmacht soldiers than "good" Waffen SS troops).