Colbain above Clapton? What does Clapton have to do to get some recognition for his considerable legacy, shoot himself in the head?
Cobain was murdered.
I hate to say it, but Clapton doesn't get his due because he lived. Had he OD'd in the early '70s like many of his peers, he would be even more famous than he is now. Instead, he overcame his addiction, lived, and continued to make music for thirty more years.
Personally, I'd put him or Hendrix above Cobain...