For jk2, gpu basically doesnt matter, everything should be fast enough nowadays, even modern integrated ones.
I use a RX570 because jk2 isnt the only game in existence. :DDD
Keyboard is a random mechanic one with cherry brown switches.
Mouse is Logitech MX Master 2S.
Think about what you really need before buying - Its easy to waste a lot of money for performance you then end up not using.
Made this mistake multiple times lol