Barnes & Barnes.
How about Nerdcore artists like MC Lars and Mega Ran?
Well considering all of the options in OP's poll are trashy pop, then none of them. I would rather no music than Taylor Swift. I think the reason why Blizz gets rock or metal bands is because both they and lots of the fans like it. Sure, a change is nice, but my guess (idk for sure) is that most fans aren't that into pop. I could be wrong and that's fine.
If I could choose it would be Bullet For My Valentine or Avenged Sevenfold but hey...
They should invite some peeps with good house music mixes and include some high quality MDMA in the Blizzcon goody bags.
Um none of those. I wouldn't pay to see -any- of those artist in concert-ever. I wouldn't even consider most of them artist just bubble gum pop with no talent (Minus Beyonce).
I don't quiet get the hype with Weird Al-he's funny but kinda meh.
I'd rather seem someone like Disturbed or Five Finger Death Punch.