As long as you stick to a game like WOW and don't switch to a fast-paced shooter, it should easily be enough. They use a 60 Hz monitor, so a 1060 GTX is easily a good alternative. You won't get the 8 GB of video memory out of WOW alone.
ASUS GeForce GTX 1060 TURBO 6G (6GB, mid-range)
That's my recommendation to them!