By far my favorite setting from the 3rd Edition Era was Midnight by Fantasy Flight Games. It is essentially Middle Earth (with the serial numbers scratched off) and Sauron won, and it presented the concept so perfectly that it made me want to run D&D 3e. That says a lot.
Later this month, May 27, Midnight returns as a setting for D&D 5e via Kickstarter. I am extremely excited, as taking 5e material and converting it to the OSR is fairly easy. I just hope they keep true to the original. Heck, I've been eagerly awaiting Midnight since it was announced in 2020.
You can view the trailer below:
You can catch the daily Tavern Chat podcast on YouTube - Tenkar