What is the best album by Led Zeppelin?

Physical Graffiti

The sprawling double-album opus containing Kashmir and In My Time of Dying, widely regarded as the definitive Led Zeppelin statement and one of rock's greatest achievements.

Led Zeppelin II

Heavier, tighter, and even more powerful than the debut, featuring Whole Lotta Love and What Is and What Should Never Be — a definitive statement of hard rock dominance.