Angriest Lyric/Vocal

Dixie Whiskey by EYEHATEGOD from "Dopesick"
or
Det Som Engang Var by Burzum on "Hvist Lyset Tar Oss"

Lennon-Gimme Some Truth
Lennon-How do you Sleep?

Public Enemy -- Fear of a Black Planet, "Burn Hollywood Burn"

I see numerous citations to heavy metal (which always impressed me a loud and obnoxious, but not necessarily *angry*), folk/protest rock (which strikes me as earnest and frustrated, but not *angry*), some post-punk/grunge (slightly angry, but only because they are sooo sensitive)...

The Sex Pistols is a start, but for pure, unbridled, white hot anger... The whole US hardcore scene--Minor Threat, SS Decontrol, the Germs, Millions of Dead Cops, Black Flag... Those were some pissed off people.

Back in my day, Dylan's Positively Fourth Street was an angry response by Mr. Dylan to those who criticised him leaving his folk roots to "go electric".