You’ll need cat 7 or 8 cable directly to your gateway from your computer room, bypassing the switches elsewhere in your home. Primary router is boss. You don’t have to hop from switch to switch to get to your primary router. I’m sure the rest of the house can get by with simple gigabit cables & switches which your computer room can still communicate with through your primary router whereas your computer room will have 5Gbps connection to Ma Bell

You can do this with triband mesh routers. Tp Link has a few good options. However, your PC will be getting the short end of the stick because the 2nd router will have substantially reduced & erratic throughput without a wired or fiber backbone connection to the primary router

Oh the HORROR !!!