I heard DMB the other day for the first time since the mid 90's. I couldn't believe how badly and poorly they've aged. Matthews literally sounds like a joke affectation while singing and their music sounds like it belongs on Sesame Street. Eric Clapton, including Cream. Poser, wannabe black american blues guitarist from the 1920's/ 30's. Hendrix was everything he could only imagine and dreamt of ever being.
Ornette Coleman....weird shit that only people who pretend to like "modern art", could pretend to like. SRV besides the song "Couldn't Stand the Weather" prior to "In Step". By "In Step", he FINALLY found his own voice instead of copying lick by lick the sounds of Hendrix and the Three Kings ( B.B, Albert, and Freddie). Hell of a guitarist but might as well been a cover band prior to his last album before the accident. I did enjoy the album he put out with his brother prior to passing, though.
ALL rap. Garbage. Every bit of it.
A lot of the pussy 70's Singer/ Songwriter crap. I'd like to punch James Taylor in the throat. Springsteen....communist propagandist.....a wannabe Woody Guthrie.
I "get" Wynton Marsalis (staying in the vein of the OP) but I really had to stop the urge I had to throttle him on stage during a performance I was attending after he shit all over Miles Davis in the late 80's. The nerve of someone that built a career, at that point, of 100 % copying Miles's modal and cool jazz sounds, while calling Mile's out on his willingness to expand and try new sounds and ideas, while Miles moved away from the very sounds that he had created decades previously, and that Wynton had exploited for his own profit. I seriously gave it thought sitting in the audience but fortunately my girl at the time talked some sense into me.
Country....besides Dwight Yoakam, Lyle Lovett, Chris Stapleton, and Sturgill Simpson (over the last 35-40 years or so) most of it is an absolute joke, particularly the last 15 years or so from Nashville. There are a few exceptions......but not many.
Pearl Jam and Nirvana.......no thanks, except for a few songs off the acoustic album from MTV appearance. Grateful Dead.......I never cared for their drug addled, meandering, meaningless live albums from the 70's and 80's. The unfocused stuff that never went anywhere pissed me off. That said, they had some beautiful songs from their studio albums during this time (particularly American Beauty) that I liked. Garcia was a hell of a guitarist but the whole band was just too stoned and lost for me for the most part, especially their live stuff which was supposed to feature their best work.