Bowie ~> Manson, Reznor, Coal Chamber, Korn and every other "dark" band
Greatfull Dead, Tom Petty ~> almost any pop/rock hybrids (ie, matchbox 20, 3E

Floyd ~> new age, trance, techno, rave, and some rock/dance this particular genre has improved some)
Beatles, Monkeys, Beach Boys ~> boy bands (n*synce)
Diana Ross/Supremes ~> girl bands
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First let me say that I am not only talking about style of music, but also public image and type of music.
Im saying that bowie was the first true dark rocker and he took shock rock to a whole new level. Bands such as mentioned above have stolen his ideas and image. not nescesarraly the sound of the music but everything that appeals to the masses.
Floyd was the psychodelic music of the day, its not the music itself that directly progressed into techno...its that techno is todays equivelent.
anyway this is just my opinion.