While I agree that each genre will have it's own legends, I personally tend to think of "legendary musicians" as those that most everyone you ask will have heard of. Ask 100 people on the street who KISS, Elvis, the Stones, the Beatles or even Billy Joel are, and 98 or 99 will probably give you a correct answer. Ask that same 100 people who Glen Danzig is (no matter how "legendary" in the punk/metal world) and you will probably get a blank stare from 75 to 80 of them.
I'm just pointing out that this line is supposed to be about truly legendary artists, not just everyone's favorite musician. I realize that everyone will have differing opinions about what and who is legendary, but my personal opinion is that 98% of the artists mentioned so far don't stand an ice cube's chance in Hell of ever being made!
I think people just tend to forget poor Bruce!