Top 10 Albums Which Were the First of Their Genre

The Top Ten
1 The Dark Side of the Moon -  Pink Floyd (Art Rock)

Art Rock already existed years before this. It was The Velvet Underground & Nico or Pet Sounds or Sgt. Pepper's

2 Black Sabbath - Black Sabbath (Doom Metal)
3 Days of Future Passed - Moody Blues (Progressive Rock)
4 Fifth Dimension - The Byrds (Psychedelic Rock)

This is a close one. The Butterfield Blues Band released East-West less than a month later, containing the title cut which was indeed psychedelic rock. Both albums likely were recorded contemporaneously, but as the Byrds' was released first, it gets the nod.

5 Highway 61 Revisited - Bob Dylan (Folk Rock)
6 The Velvet Underground & Nico - The Velvet Underground (Experimental Rock)
7 In Rock - Deep Purple (Heavy Metal)

Black Sabbath's self-titled debut precedes In Rock by a few months. In Rock isn't even metal. Black Sabbath invented it not Deep Purple. get your fact straight.

8 My Generation - The Who (Proto-Punk)
9 Sliver Apples - Sliver Apples (Electronica)
10 Are You Experienced - The Jimi Hendrix Experience (Acid Rock)
The Contenders
11 Schoolly D - Schoolly D (Gangsta Rap)
12 Killing is My Business and Business is Good - Megadeth (Thrash Metal)
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