5. Grateful Dead
Grateful Dead was known for its unique and eclectic style, which fused elements of rock, folk, bluegrass, blues, reggae, country, jazz, psychedelia, and for live performances of long musical improvisation. They were recently ranked 55th in the issue "The Greatest Artists of all Time" by Rolling Stone magazine. —XFINITY Entertainment Staff (Photo by Hulton Archive/Getty Images)
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