Based on my experiences with triple A title graphical demands, you're looking at getting a gtx 1080 or RTX 2070 at a bare minimum. If you expect longevity of 5+ years before a graphics card upgrade, that hardware demand can easily increase to a GTX 1080 ti/RTX 2080. If you don't believe me, watch Metro Exodus on ultra via YouTube, which has an insane graphical performance demand. A few years ago I would state the above hardware is insane overkill, however this is to attempt to factor in future triple A title demands.
This is all assuming you have an adequate processor. What processor do you have or plan to have?