sushi: the blind boys of alabama, canton jones, mary mary and others will disagree with your assessment of r&b while reliant k, pocket change and others will disagree with your assessment of punk.
as for the crossover between cantorial and opera, a good study on the subject was elucidated in the June 2000 edition of the Voice Foundation Journal, “Comparing historical and contemporary opera singers with historical and contemporary Jewish cantors.”
it is amusing that the only people i ever heard claim that there is a “jewishness” to music styles or genres were people with very narrow and limited exposure to music. i find the claim absurd, immature and nonsensical.
for music lovers, it is disheartening that there exists such a strong repression of this particular art in the frum velt.
there is no disagreeing, however, that a song that exhibits prust and disgusting themes should be avoided by a yirei shomayim.
finally, it should be noted that i have found that the only jewish musician to have attempted to blend various styles into a new genre of jewish music was carlebach but his musical influences are recognizable anyway and those who perform in the carlebach genre today draw heavily from alternative rock.