Going along with others, you won't really find a "good" silent wireless mech keyboard. I was also looking for one about a month ago and I just took the wired route because the keyboard is not moving anyway. I also took MX Reds which I would recommend for not being loud and great for gaming and only good for typing if you are accurate (linear feel instead of a bump). You could also look for an MX Brown one if you like having tactile feedback which is generally called the midpoint for gaming and typing. So can't exactly recommend a wireless keyboard because they are rare and expensive, but I would rethink the wireless thing if you want a mechanical keyboard.
Gaming ------- Typing
Red Brown Blue