I think The Floyd came up with the best Concept albums ever: "The Dark Side of the Moon", "Wish You Were Here". Their original member (forgot his name), his increasing lunacy and extreme alienation/isolation with fame/fortune found in between was the main source.
One concept album with great music from plenty of tracks but whacky, delirious, even insane lyrics is "The Lamb Lies Down on Broadway" (Genesis).
One trashy CA - cannot think of one right now....



