I have several Android devices that work without signing into any account. I get my apps from F-Droid and some apks extracted from my phone that does have a Google account.

Samsungs are annoying, with their regular nagging, begging you to also make a Samsung account. I would never buy one but I’m on-call with a work-owned Samsung and there’s one notification that can’t be disabled. It goes off every once in a while and makes me think I have a service call.

Windows, eh, I switched to Linux long ago, but there’s always alphabet soup edition (IoT LTSC) that is far less bloated.