Grateful Dead was an American rock band formed in 1965  in California
I've never heard their music before.
Well they are good. Lenny Kay attest to this by saying that  they touches on ground that most other groups don't even know exists"
I'll have to look them up then. How famous are they?
They were  ranked 57th by "Rolling Stone" magazine 
Wow that is quite the honor! Must be a great band.
worldwide.
The Grateful Dead was founded in the San Francisco Bay Area amid the rise of the counterculture of the 1960s. The founding members were Jerry Garcia (lead guitar, vocals), Bob Weir (rhythm guitar, vocals), Ron "Pigpen" McKernan (keyboards, harmonica, vocals), Phil Lesh (bass, vocals), and Bill Kreutzmann (drums). Members of the Grateful Dead had played together in various San Francisco bands, including Mother McCree's Uptown Jug Champions and the Warlocks. Lesh
Grateful Dead
The Grateful Dead was an American rock band formed in 1965 in Palo Alto, California. The band is known for its eclectic style, which fused elements of rock, folk, country, jazz, bluegrass, blues, gospel, and psychedelic rock; for live performances of lengthy instrumental jams; and for its devoted fan base, known as "Deadheads". "Their music", writes Lenny Kaye, "touches on ground that most other groups don't even know exists". These various influences were