Which album was a band's creative zenith/magnum opus before falling off?

This is exactly what I was coming here to comment. This album was fucking astounding, complex, beautiful, intense, musical, destructive... Every single noise in that album was intentional and meant something. Trent was making music at the time that was so far above and beyond what anybody else was doing or has done since.

Then Atticus Ross joined. Now they make background music for movies. It is fucking heartbreaking.