Nvidia used to be the easy way to go. The open-source Nouveau driver lacked functionality. The official Nvidia driver was proprietary but worked well. (Though the Radeon drivers were proprietary at the time too. And Intel graphics hardware was always poor.)
Serious question because I'm in the same situation of switching to LM, having a nvidia GPU. Your talking in past tense.. so nouveau drivers are actually useful now? Talking HDR, Gsync and DLSS