LTSC was the best version, but now apps are starting to require specific release versions of windows. The current Windows 10 LTSC is based on Windows 10 21H2, and will not be updated beyond that. Ableton 12 for example requires Windows 10 22H2.
So until Windows 11 LTSC is released, I have been using Windows 11 Pro Education. It seems to be almost as good as LTSC (ships without most of the bloatware), but allows you to run a current version of Windows.
Windows 11 still feels much slower than Windows 10, even on a modern system clicking on the wifi icon takes 1-2 seconds for the window to open and then you can see elements of the window load. Opening file explorer is the same. This a fresh install on a Ryzen 6800H laptop with a fast NVME SSD. Then there are all the popups asking me to use OneDrive, Edge, Etc. Truly a terrible OS.