Wine is pretty much hit and miss, but has made extraordinary progress running Windows apps over the last few years. A good way to research each game is to Google its name along with the word, "wine." World of WarCraft is supposed to run really well under wine. I play StarCraft with wine and it runs very satisfactory.
Frank's Corner is a good place to learn more.
Having said that, all those games are made for Windows. There's nothing wrong with playing them in their native OS.

You can set up a dual boot system with Windows and Ubuntu. Might take a minute or two to boot between the two...