So I just found a band today which seems mega awesome. They're called "The Maximum Hormone" and are from Japan and they mix at least 4 musical styles in each song. Take this for example https://www.youtube.com/watch?v=TdwT5JlH8gM they start with screamo and hardcore, then change to funk then rock, back to screamo and then alternative pop and after that it gets really weird.

And the crowd loves them, check out the live video here https://www.youtube.com/watch?v=mCGSCxv1Jec and look and wonder what this super big crowd does, everybody is headbanging from the first line to the last.