Disney+ is an absolute tier above everyone for video and audio. First, the fact that they rescanned all of the star wars movies and other film content into 4k, so they look absolutely masterful. Return of the Jedi and Empire look significantly better than today's films in 4k. I really need film rescans to become a norm rather than upscaling. I am begging for a 4k rescan of 2001 space odyssey [not disney related but i need it]. And almost everything disney is 4K HDR10 UHD DOLBY/ATMOS/ETC highest end out the gates.
I'd put Prime and netflix on par for 4k...prime has more old stuff, netflix has more new stuff in 4k especially series.
HBO is hit or miss...their new 4k HDR stuff is outstanding (films). but most is not.