If you hold a decent amount of coins and want complete anonymity/security when it comes to your transactions and crypto deals then I'd recommend tails linux ( of course I'm talking about an offline wallet here and not a node wallet.. IE private key only). It's just about the best OS on the planet when it comes to privacy and anonymity. Also If you use a hardware wallet you're pretty much guaranteed to be safe anyways on any operating system so the OS doesn't really matter in the end... A good thing with tails is as soon as you're done it basically erases itself. You can also use it anywhere on a USB drive, so take it anywhere. Heck do your crypto shit at work if you want!

https://tails.boum.org/