Nirvana
"Bleach" in '89
"Nevermind" in '91
and then the not very good one- "the slump" - "In Utero" in '93.
I personally don't think things would have gotten better them with a 4th.
And some of these bands listed to have "slumped" after a couple of good ones
starting out...like Steely Dan...???
Van Halen slumped after their first 2??
I sure don't understand... I guess ZZ Top should make the list too.