King Diamond Best known for Mercyful Fate and King Diamond - Choose the one song that you think has King Diamond's best performance as an individual musician. - We are not trying to choose the overall best song that he appears on. We're looking for his best vocal performance. - I'll leave this open for the next two weeks. Have your vote in by then or it won't be counted. - Please also vote for a single musician that you'd like to see featured in a future poll.