Recorded voice that irritates me the most? Dead Kennedys.
I am, personally, pretty tolerant of imperfect singing if the song is good, think a whole lot of bands just let the best singer they have sing, instead of finding someone who can really sing, and that's OK.
Biafra is... Something. I can't say whether or not it works in Dead Kennedies, but IMO it works just fine in Lard. I think that for the ethos of punk music--not pop punk, but the real shit--he's pretty good.