I’d recommend you look into 4K77 and 4K83 for Star Wars and Jedi respectively. I hope it’s alright to mention that the Star Wars Trilogy Forums would be a good place to seek additional information about them. Empire Revisited might be a consideration for ESB - it’s in 720p, like Despecialised, and it does retain some of the Special Edition changes, so if you’re looking for an absolute purist approach it won’t be suitable, but it’s an extremely polished version of Empire with many fixes, extra attention to detail, and some stunning new shots, especially on Bespin (there’s no 4K80 yet, though there is the older Dreamastered project).
Thank you, I’ll look into it.