Which mechanical keyboard do you recommend?

Razer Huntsman elite

Corsair K70 RGB TKL is the one i recommend

Price doesn't matter for you? There's a lot of good keyboards

corsair has realy good ones

Royal Kludge RK61, Epomaker Skyloong SK61, Anne Pro 2, GK 61 all of these keyboards are great if you going to play competitively i recommend going for Yellow Switches option on them, however if you got good amount of budget go for either Apex Pro TKL or Razer Huntsman Mini/V2 as they are the best in the market as of now, i personally prefer the first keyboard's i listed since you can switch/replace the switches to dif ones or even mix them and if you lube them it sounds amazing.