I feel like a 1070 with 6GB ddr5 would do fine if you’re running at 1080p a 1080 would be overkill imo unless you wanted to run 1440 or 4K then go for the 1080 ti
all of these are fine so i'd go with the 1070ti if you don't want to break the bank as it is significantly cheaper. (I have a 1060 6gb and hit 100+ fps on high so you should be fine)