I'm putting this list together a bit too quickly so I'm not sure how happy I'll be with it. I'm also not sure if all of these count but I'll put them on there and hope so.
1 | The Beach Boys | Pet Sounds
2 | Sufjan Stevens | Illinois
3 | Arcade Fire | Funeral
4 | Radiohead | In Rainbows
5 | Radiohead | OK Computer
6 | Yasunori Mitsuda | Chrono Cross OST
7 | Spoon | Girls Can Tell
8 | The National | Boxer
9 | Tegan & Sara | Sainthood
10 | The Postal Service | Give Up
11 | Metric | Fantasies
12 | The Strokes | Is This It?
13 | Explosions in the Sky | The Earth Is Not A Cold Dead Place
14 | The Strokes | Is This It?
15 | Spoon | Ga Ga Ga Ga Ga
16 | The Shins | Chutes Too Narrow
17 | Radiohead | Kid A
18 | Paramore | Riot!
19 | Olafur Arnalds | Eulogy for Evolution
20 | Muse | Black Holes & Revelations
21 | Sigur Rós | Ágætis byrjun
22 | Arcade Fire | The Suburbs
23 | Tegan & Sara | The Con
24 | Lightning Dust | Lightning Dust
25 | Fleet Foxes | Fleet Foxes
26 | Paramore | Brand New Eyes
27 | The National | High Violet
28 | Spoon | Kill The Moonlight
29 | The xx | xx
30 | Lily Allen | It's Not Me, It's You
31 | Godspeed You! Black Emperor | Lift Yr. Skinny Fists Like Antennas to Heaven
32 | Coldplay | A Rush Of Blood To The Head
33 | Yeah Yeah Yeahs | It's Blitz!
34 | No Doubt | Tragic Kingdom
35 | Kanye West | My Beautiful, Dark, Twisted Fantasy
36 | Wilco | Yankee Hotel Foxtrot
37 | Animal Collective - Merriweather Post Pavillion
38 | Laura Marliing | I Speak Because I Can
39 | Tegan & Sara | If It Was You
40 | Okkervil River | Black Sheep Boy
41 | Death Cab for Cutie | Transatlanticism
42 | Broken Social Scene | You Forget It In People
43 | Regina Spektor | Far
44 | Duffy | Rockferry
45 | Norah Jones | Come Away With Me
46 | The Cure | Disintegration
47 | Switchfoot | Oh! Gravity
48 | Sufjan Stevens | Seven Swans
49 | Nobuo Uematsu | Final Fantasy X
50 | Guns n Roses | Appetite for Destruction
51 | Jack Wall, Sam Hulick, David Kates, and Jimmy Hinson | Mass Effect 2 (no idea if it counts)
52 | Pink Floyd | Dark Side of the Moon
53 | Daft Punk | Discovery
54 | Nirvana | Nevermind
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