There are several great suggestions for you to look at! But having had or still have most of the riffles above, the one not mentioned that I will not part with?
the Crown in 500 mm, and only 500, unfortunately the longer ones are low percentage acceptable.
it is a one holer at 50 with multiple pellets, 21 round mag, 200-300 round shot count and fairly cheap (used)and very ergonomic and yes it’s quieter than the HW100, extremely versatile, you can go from 12-24fpe in seconds, does require some tuning/understanding of the way of things
my next would fall in line with the others-Taipan- way more compact, not ergonomic, very simple, robust, best trigger ever!
then hw-100, simple,
good luck!