You can have Morrissey when you pry him from my cold, dead hands...
Morrissey: You Are The Quarry
Portishead: Third
Elbow: The Seldom Seen Kid
Antony and The Johnsons: The Crying Light
Bright Eyes: I'm Wide Awake, It's Morning
Arcade Fire: Funeral
As for artist of the decade, it's a tough call. I'm going to go with... Morrissey.