They're all pretty much the same for overclocking tbh, minor differences/silicon lottery. Just get the one with the best cooling as Pascal downclocks when temperatures rise.
1080 FTW has higher temps. wont be good for overclocking. SC Gaming ACX 3.0 is the best 1080 from EVGA for you. you might want to look at other brands too. Here are all the gtx 1080s pros and cons. Published on December 2017: