That depends on resolution. At ultra settings and 1920x1080 integrated GPU won't be able to run World of Warcraft, for example. Even Nvidia 1060 can't, and I think that it's pretty powerful GPU. And for 4K resolution probably something high-end is required.
I don't think any of those games are GPU intensive. Blizzard seems to want their games to run on as many machines as possible, and Rimworld and Factorio are both 2D.