alloftheabove As for amount, since LTSC does not have store and photos edge etc extra telemetry, it's the clearest (but outdated, less user-friendly and with frozen-in-time-bugs). Education follows with mostly benign telemetry, while normal Enterprise has all the peskiness enabled by default.
Education 20h1 (19041.450) is the Best. Using it since 15 + days without any tweak . Working as best of the best. No any external firewall (WFC) notifications for win things trying to connect to tcp connection while udp are as they are with Settings Blocked all Incoming & OUtgoing Connection Plus Notify when something wants to connect. only SVCHOST.exe at system32 given outbound permission. Disabled Defender & Installed ESET Smart Security Premium. Awesome Expereince using Education SKU win10. Thanks a lot to @BAU for suggestion.