Artists Seemingly Incapable of Laying a Turd

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.