Which GPU for 60 fps 4k ?

Hi everyone,

I am receiving my Rig Ally X this week. I am thinking of buying the AOOSTAR AG02 and add a GPU. Which GPU should I choose ? I won't need more than 60FPS but I'd like 4K, because it will be connected to my 4K TV.

Is the 4060 and 4070 too much for my needs ? high Nvidia GPU do you recommend me ?