Bands/artists who never topped their debut album.

[Magic]

The Killers
White Lion
Muse
Sex Pistols

Interesting choice with Muse. I honestly feel they never peaked until Absolution and have been cranking out good albums since.

 

[Riff Raff]

So many bands mentioned that I feel more than topped their debut.

 

[TeleCat]

Wishbone Ash