Did he write most of the songs?
No. Grohl is credited with helping write only two Nirvana songs, one of which was "Smells Like Teen Spirit." Their bigget hit.
Now, how many truly great songs did Nirvana really have? Let's be honest. Not that many.
How many hit songs has Grohl been a part of?
Foo Fighters, QOTSA, Vultures... The success of Dave Grohl's career has long ago eclipsed that of Kurt Cobain who, truthfully, became a generational icon primarily because he blew his brains out.
“(as was the Doors’ Jim Morrison whose antics handicapped and eclipsed his far more-talented bandmates).”
So Jim died.
How well did The Doors do after that point?
/mic drop