Windows LTSC / IoT comes pretty damned close. It's the only version I install. I'm always shocked by the <20 processes running in Task Manager on a clean install.
It may be 20 less but still hundreds. I'll never understand the LTSC advocacy, it is still the same thing except they mopped up the most disgusting looking liquid seeping out to the floor but didn't touch the huge turd sitting in the middle.
No in my case it was literally just 20 processes or so. It didnt fill the default window size.