As with others, nailing down just one is difficult, I'd go for:
Neurosis - Through Silver In Blood Metallica - Master of Puppets Slayer - Reign In Blood Acid Bath - When the Kite String Pops Down - Nola Emperor - Anthems to the Welkin at Dusk
Prince , lovesexy. Rock , pop, soul , funk , gospel , in just one album.a masterpiece from the genius. You couldn't skip tracks on it as song were played in a continuous sequence .
Others ... Ricochet (Tangerine Dream) Misplaced Childhood. There are better individual tracks on Script and Fugazi, but as a complete work this surpasses them. Leige and Leif Aqualung