The best legal version of Windows I have figured out that you can actually buy as a regular consumer is Windows Server Essentials 2022. (maybe they’re up to 2024 now?)
Server Essentials is regular Windows 10 GUI with absolutely no spyware, OneDrive, or pre installed ads hiding as shortcuts. It doesn’t even require a TPM. The only nonsense that comes pre installed is Edge.
Updates are for 10 years minimum and they only install when you tell them to.