Is it just me - opinions here seem to be more about personal taste rather than people who can't sing. There are a lot of singers whose style doesn't appeal to me, but I wouldn't go as far as to say they can't sing - obviously they can or they wouldn't be "famous" singers. If you want technical brilliance go to the opera. If you want to feel an emotional connection with the singer, the song, the lyrics, the music, the personality, then most of the singers listed above qualify as "great". Just my opinion...