Artists Seemingly Incapable of Laying a Turd

I offer up a few artists I like simply because they have never released a crappy album their entire career...

Tom Waits
Elvis Costello
Steve Earle
Paul Weller

Who are yours?
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Steeley Dan
Nora Jones
Mannheim Steamroller 
Patricia Barber
Pink Floyd 

All my fav artists did put out some turds!!! PF with "Music from the Body" "The Final Cut" "Pros and Cons..."(I know, it could have been The Wall, but it Did Not!!)
Genesis, Van Der Graaf Generator, Dead Can Dance, Tchaikovsky, Ligetti, Mozart, Beethoven, Dvorak..., all produced some "fillers" I cannot relate to. Steven Wilson and Porcupine Tree made me cringe more than once, but I still consider S W being the reincarnation of PF!!! Not being able to produce a Turd means they are "serving the goodies", the prev posts lists some of them...

Can't think of anyone.

Marshall Crenshaw
Rosanne Cash
The Op's thread title completely turns me off.
The Beatles
Pink Martini
The LA Four
The Beatles
Tom Petty
John Mellencamp
Stevie Ray Vaughan
Beatles turds:
Hey Jude
I want to hold your hand
Iris Dement, Buddy Miller, Emmylou Harris, Rodney Crowell, Patty Loveless, Jim Lauderdale, Rhonda Vincent, Ricky Skaggs, Bonnie Raitt, Ry Cooder, Richard Thompson, Loudon Wainwright III, Leonard Cohen, Hank Williams, J.S. Bach. John Hiatt, almost ;-).
Any Quartet with a lead singer named Jim Morrison.
I can't think of an artist I love that hasn't laid a couple of eggs...but I'd say Vladimir Horowitz has come closest to the ideal.
Leonard Bernstein tried to be in jazz and did not succeed. Everything else pretty much is extremely great and inspiring including lectures.
I would assume that in his opinion Boston Pops is a turd.