I have shot a lot of 22 cans side by side and the Thunderbeast TakeDown consistently the quietest with the least first round pop. Another quiet can is the Keystone, but they closed up shop early last year. Kinda loud FRP but after that they are hollywood quiet.
The micro Osprey sounds the quietest to me. But it's design makes it unpopular. TBAC takedown, Dead Air Mask, Silencerco Sparrow, Spectre 2, AAC element 2, tac sol axiom. All great choices