bottlenecks are mostly fiction or misconceptions at best.
GPU choice should first take into account things like monitor resolution and refresh rate, games you play and only then CPU.
for 60Hz monitors you can go:
1080p - GTX 1060/1070
1440p - GTX 1070/1080
higher res - whatever you can afford.
for higher refresh rates it's debatable as this CPU will have hard time to cross 100FPS in some games while can go well over 150 in others. basically you are not really limited by CPU. if you can comfortably afford higher end GPU like GTX 1060 or even GTX 1070 - do it.