Combine this with unhook[1] and you can hide all the "algorithmic" parts of youtube aswell.
Only issue is channels that mix shorts (which I am not interested in) and regular content. If anyone knows how to hide shorts on a per channel basis in the subscription feed, I'm all ears.
That is a great list, though I think content discovery is still a hard issue. Below are a few music-centered channels. To illustrate that discovery is hard, I had a bit of a struggle to find a few of them, even when I knew what I was looking for. Content covers performance, music theory, money, and history. I also verified no overlap with your list.
Just subscribe to the ones you like and go directly to https://www.youtube.com/feed/subscriptions
[1] for example:
3Blue1Brown
Beyond The Press
CGP Grey
Captain Disillusion
Cody’s Lab
Computerphile
EEVblog
EVNautilus
Electroboom
Engineering with Rosie
Evan and Katelyn
Everyday Astronaut
Half as Interesting
Huygens Optics
Jay Foreman
Kurzgesagt
Lockpicking Lawyer
Louis Rossman
Mark Rober
Matt Parker
NileBlue
NileRed
Numberphile
Periodic Videos
Physics Girl
PolyMatter
Practical Engineering
Real Engineering
Real Science
RealLifeLore
Simone Giertz
Skill Up
SmarterEveryDay
Stand-up Maths
SteveMould
Strange Parts
StuffMadeHere
Summer Rayne Oakes
Technology Connections
Tom Scott
Two Minute Papers
Veritasium
Vihart
Vsauce
Wendover Productions