Have you tried using 35mm theatrical cut prints to undo changes made in 2004 or later, such as the Emperor scene? This would result in higher PQ than SDTV version of the 97SE.
Not theatrical cuts, but I did use Adywan’s 1997 Reconstruction. Looking at laserdisc and tv captures, the coloring is pretty close to achieve the same look. Of course, it wouldn’t hurt to look for a good 35mm source. I really wanted to maintain the clean picture quality that the 2020 blu ray has since I’ve always felt these versions, alongside the the theatrical cuts, are deserving of such a visual treatment.