Well ,
the heaviest thing i ever heared was pure **** .. thesong was called
'**** your God' and it was by the band 'Deicide' ..
Thats deffenly the hardest song i've ever heared . but its also the biggest **** 've heared (except for all those Rnb , rap persons) ..
As for songs that are still good . most Screamo , deathcore , grindcore , Trash-metal bands are pretty aggresive and mainly good .
ex. (the first to come to my mind) :
- (screamo) Hopes die last - thanks for coming (I LIKE YOU DEAD!)
- (Screamo) Emarosa - 'Armageddon'
- (Deathcore) Suicide silence - The price of beauty
- (Deathcore) As blood runs black - 'Hyster prynne'
- (Deathcore) Bring me the horizon - 'Shed light'
- (Trash-metal) Light this city - 'The unelcome savior'
- (Grindcore) Iwrestledabearonce - 'Tastes like kevin bacon'
But why loo for aggresive music ? its all about how it sounds .. (most peopple as me how I can listen to the scraming .. I say I don't ind them screaming , I would if i wouldn't sound .)
I'm not sure if there's anything mor aggresive then this except for some **** deathmetal bands like deicide
As for your question , there are genre's more agresive then deathmetal .;
Deathcore and grindcore ..
check these :
Suicide silence , As blood runs black , (old) Bring me the Horizon , Job for a cowboy , Here comes the kraken , annotanations of an autopsy
Forother check out youtube ;)
EDIT : (lol only listen if you like to much drums , and all kinds of screaming .. whisper , inward , etc..)
https://www.youtube.com/watch?v=tpsNdqzIeDM suicide silence - The price of beauty
https://www.youtube.com/watch?v=ZrFTR9fucr8 IWRESTALEDABEARONCE - tastes like kevin bacon (this female vocals is insane .. )
https://www.youtube.com/watch?v=ULw6Dj94ZSc Suicide silence - The fallen
https://www.youtube.com/watch?v=3Ah94AztDlU As blood runs black - Hestyr prynne
https://www.youtube.com/watch?v=AWggPLXeOkU Bring me the horizon - Pray for lagues
https://www.youtube.com/watch?v=1H4SVRApGhM Light this city - the unwelcome savior
https://www.youtube.com/watch?v=Mxi6tSCYygc here comes the kraken - don't fail me darko
https://www.youtube.com/watch?v=Ue0kCn5YRE0 JFAC - knee deep (Spongbob movie)
Give it a go
but I warn you .. i know all bands that have been posted until now in this thread .. and these guys tower out above them all