I seem to have the opposite opinion of Karen Carpenter.
She was a wonderful singer of very melodic songs.
I can remember reading several articles that she was very possesive of her brother and tried to come between any relationship he tried to have, through jealousy or spite.
I do not therefore have this sweet and sacharin view of her, in fact she was portrayed as a very bitter woman. I havent seen the film of her life but there must have been some cover up of her feelings and behaviour during her career.
That is to say, I love her music.