None of the Tier 1 CPUs from this list will bottleneck your GPU
http://www.tomshardware.com/reviews/gaming-cpu-review-overclock,3106-5.html
(including the lastest Intel Skylake CPUs)
I would recommend you either a i5 2500k or an i5 4690k, depending on you budget (although both require you to buy a motherboard with the correct socket). Going for i7 CPUs won't really help you if you only look for gaming performance.