Need really really good suggestions to the best and loudest heavy metal songs.?

For some reason, I've been needing to listen to increasingly louder and harser music. I've found some metal songs but I have found them weak. For one, I've never listened to metal music because I found it too harsh but now I have found it far too weak. You have to recommend me some of the hardest and most outragous and most screaming blaring songs so you can please help me get this out of my system. Don't hold back in your suggestions instead try to push a little harder.