I would say Wormed and quite a few brutal death metal bands in general.(Soils of Fate comes to mind...heavy sh!t)
And oh ya, electric wizard as well!
Dopethrone is just f*cking DOPE!

The two I would have to select is Chevelle - Wonder What's Next and Tool - Ticks & Leeches. Both these songs I have felt are hard hitting with the vocals. Both of the vocalists are pushing thier voices to the edge of a hernia, which is absolutely "brutal". I focus on vocals when portraying an emotional, rather than the instruments. Instruments are the least emotive part of a song.

One of the heaviest songs I've heard would probably be Whirlwind- Verdict of Vengance. It's probably the heaviest/deathiest I've gone into metal. =/

\m/

I'd have to say Bonnie Tyler - Total Eclipse of the Heart

I love how everyone thinks they are being clever by saying a lame song.

very angry bands: [yes check them out]

Whitechapel
Carnifex
Rose Funeral
Suicide Silence
The Acacia Strain
Despised Icon
Dimmu Borgir
Behemoth
Decapitated
and the list goes on.

Bludgeoned face.
Licking my fingers of decrepit funk.
My dear your face is so blank.
Where did you get those feelings.
Please don’t leave help me live.
Can’t control myself.
Dilated eyes. Pale white skin.
I’m laughing in your face.
Your skin entrenches me.
Now you’re ****ing dead
I can’t be certain your remains will be insured.
Beyond the grave is longer than you think.
I saw the first slut mangled in front of me.
Of course controlling my actions was not an easy task.
It wasn’t long before I found myself indulging.
Against my will I please myself once more.
Breathe.
****ing breathe.
I swear you’ll weep.
While I sew your cun+.
And now you rot…

"Articulo Mortis" Whitechapel

-.-

Anything by AxCx.

Probably "Kim" by Eminem...:D It's not rock nor metal but its an angry song.