best bang for the buck would be a ryzen 3600 cpu + 16gb of 3200mhz+ ram (3667 has been claimed as the “sweet spot” for performance before you get severe diminishing returns, might be expensive compared to 3200mhz ram tho)
gpu depends on how serious you are about gaming. nvidia rtx 2060s and 2070s have reasonable price / performance ratios. 2080s/2080ti are pretty expensive for what you get and probably not worth the price
if you’re only going to do 60hz gaming you could probably get away with a 1660ti even, though you’ll be missing out on some RTX exclusive driver features and ray tracing stuff if any of that even matters to you
higher refresh rates are nice even for basic desktop stuff, if you can get a monitor that’s better than just a 60hz monitor i would recommend it. 144hz monitors are available as tn, ips, or va varieties depending on what you want the most out of your display
