No, I can't honestly recommend exact settings. I personally don't play GTA V or many games like it. Games are all the same, in that the cpu and gpu are paired and software/hardware and firmware all play a part. As in there's very few games in the last 10 or so years that don't use AA, AF, mxaa, txaa, fxaa, smaa or a combination. Grass is grass, be it in WoW, or Starwars games or GTA V, as are shadows, tesselation, directX, Vulkan, etc.
That said, I'm not you. My tastes and my expectations, my pc, my everything will differ from yours, as will anyone else's. So it's going to be on you to decide exactly what settings you can live with, what settings you can't, what fps you must have etc.
I'd start with dropping the AA to x8 and grass to high, see how the game responds. Do you think it's terribly ugly now? Dunno. Drop shadows to high, reflections to very high etc and keep playing. You could try turning on gpu v-sync, since new nvidia cards use adaptive v-sync, not the old fashioned v-sync, and that alone might reduce/eliminate the stuttering.
There's nothing inherently wrong with your pc, it just needs a little tweaking to get better performance vrs higher quality.