Also, most of mixers listed above are unfamiliar or just me?
Except for Chipmixer, most of them are new or at least started in 2018/2019. Bitcloak is kinda old though. And remember that it's just OP poll, some popular mixer might not make it.
I'm not sure Sudoku Wallet is mixer, since they claim they don't have control over your Bitcoin and use CoinJoin.
Sudoku Wallet - is a bitcoin tumbler, where you can mix your coins with CoinJoin and receive clean coins, which are not related to your identity.
It's exactly because you use CoinJoin that ETFbitcoin said you're not a mixer. You do know why right?