I checked whattomine and it gives me vega64 as the best option with 40MH/s, while the other cards you suggested have less hashrate. since my electricity is going to cost me almost zero, I'm more interested in finding the best GPU to mine ETH. I think people have a problem with mining because of their electricity fees, they consider other options to ensure the most profit based on their power costs.
1080Ti has 35MH/s and seems to be somewhat better than other cards. what I actually need is to know how I could reach the fastest ROI with "free" electricity? I want to know that.
1080ti will give you 50MH on ETH with the pill.