I would put Disney+ after apple. Both AppleTV+ and Disney+ consistently looks great to me. Netflix is strange as it generally looks good but whatever compression they use does something funny to the picture which makes it look fuzzy and sharp at the same time to me.
Netflix: 15-18 Mbps
Disney+: 25-30 Mbps
Amazon Prime Video: 15-18 Mbps
Apple TV+: 25-40 Mbps
HBO Max: 15-20 Mbps
This is from an LLM but it tallies with what I remember reading. Apple TV is by far the best, followed by Disney+.
Netflix unfortunately seem to use any improvement in compression encoding efficiency to reduce bitrates, rather than improve PQ at the same bitrate. It's definitely got worse over time. I also remember reading that for content they deem more compressible they use a lower bitrate.
I can sort of get that on the lower plans, but its frustrating they won't improve PQ (or at least keep it the same) for the (expensive) 4K plan.