Angriest Lyric/Vocal

McCartney, not Lennon, wrote "Helter Skelter".

The song is about a popular amusement park ride in England.

The purpose of the song was to record something more raucous than anything by The Who.

There is longer version (20+ minutes) that was never released.

There’s one thing I know I'd like to live long enough to savour,
That’s when they finally put you in the ground,
I’ll stand on your grave and tramp the dirt down.

from a song ("Tramp the Dirt Down") written by Elvis Costello about Margaret Thatcher.

Firestarter - Prodigy

Any lyric from Skinny Puppy's Too Dark Park

Just about everything from Trent Reznor and Nine Inch Nails.