In The Spirit Of High Fidelity...This is nearly impossible, and this list would probably be different if I were doing it tomorrow, but as of right now...
My Top 5 Albums:
1. OK Computer, Radiohead
2. Wish You Were Here, Pink Floyd
3. The Clash, US version, The Clash (UK is groundbreakingly great, but it doesn't have without Hammersmith Palais and Complete Control, so I gotta rate the US version better)
4. Led Zeppelin I, Led Zeppelin
5. Rubber Soul, The Beatles
I struggled with 1 and 2, since I love The Bends by Radiohead and Animals and Dark Side of the Moon by Pink Floyd very equally. I hate leaving them off, so I'll just mention them here :)