I mean, nothing in the 90s is touching Nrivana. They are easily the best band of the 90s. Radiohead were the UK's best effort, Muse were incredible too in the early days. But the 90s was a great era for music... electronica came to maturity, indie was popular, pop was unpopular, there were some truly great bands of the 90s. I'm surprised you dis Portishead, I'm kinda guessing you didn't listen to it because that's not the kind of music people tend to hear and think "boy this is shit". It's the kind of music even old people like.