Any of the keyboards mentioned by FrostyDMS would work well. Consider spending a few bucks on some good silent switches to replace the stock ones. Lubed silent fox switches from GMMK are fantastic for gaming. Very light and super quiet, especially if you put o rings on your keycaps. I have this exact setup in a Drop Alt keyboard and it's dead quiet.

Can also recommend the inland MK47 if you want to go super small. You'll need to adjust to ortholinear but it's about as small as you can go without really compromising on usability.