I think the gold medal goes to AC/DC and Guns 'n' Roses. These are two good bands and honestly nothing more. I'm not taking a shot at them, I enjoy some of their music, it's just that I don't think they deserve the acclaim and critical lauding that they always seem to get from people.
AC/DC has great guitarwork and some good songs, but other than that, it's just the same "hard rock riff" formula with a somewhat-melodic solo thrown in at the end. And Guns 'n' Roses is just another hair band.
Who do you guys think is the most overrated artist?