Greatest Pieces of Physical Media (4K, Blu-ray, etc.)

[A113]

I've been doing a lot of set-up in my home theatre lately mainly calibrating my sound system and projector and that involves going through a fair amount of test films (usually something random on Netflix or Prime Video) but the majority of the time, I always go through my physical collection and pick out a few demo discs to help me out. What qualifies as a demo disc? A Blu-ray that's the peak of home entertainment, top rate sight and sound, practically theatre quality. Some demo discs I tend to use the most are Avatar, The Tree of Life, Eraserhead, and The Lord of the Rings trilogy. Then, I got to thinking, what are the greatest pieces of physical media? Not just in terms of PQ + AQ but in terms of bonus features, commentaries, and behind the scenes footage. So if I had to pick a handful of the greatest Blu-ray's (etc.) of all time, I'd likely go with the Alien Anthology, 2001, Eraserhead, The Exorcist, and Jurassic Park. Now, I'd like to hear from anyone else willing to toss their hat into the ring. What are some of the best physical media releases of all time?