That's a nice list, thanks for sharing!

I've tried robosats, bisq and some others.

I'm not keen on bank transfers because there's the potential to be flagged and debanked if I pay someone on some blacklist for sats. And I haven't had luck trading Amazon vouchers...

BTC > Monero > BTC looks like it would work but it shows intent of obfuscation much like mixing. This is fine but it's another red flag for surveillance systems.

Business and non-KYC colocation mining seem like some of the best options. You're not showing intent to obfuscate and at the same time maintaining privacy about how many sats you have, and how they're spent moving forward.