Depends on your expectations really, I use a 6700XT for mine as I want to run native 4K at higher fps for mine, but if you are saying a used PS4 is actually an option then your expectations are probably not that high, so something like an RX580 or a GTX1660, 1650 Super. I would recommend the RX580 really though, the 8GB of VRAM is starting to show it's value I think (obviously this is used, if you wanted to buy new, I wouldn't really recommend anything lower end than an RX6600 as I don't think the value is really there).