I lived in Seattle from 1985 to 1999. Let me tell you, it was an awesome place for music! Not just the big hitters like Pearl Jam, Nirvana, etc, but loads of other great bands like Green River, Candlebox, Mudhoney, and Motherlovebone, and a little known gem in a band called Super Deluxe. There were always free gigs to go to, including KISW's "Pain in the Grass" series at the foot of the Space Needle.
I've always loved grunge music, and probably always will, but to stay on topic, I sort of quit listening to Nirvana from 2000-2010, as technically they just didn't have everything that more complete bands like AIC and Soundgarden had, and I thought they had been "played out". With that being said, these last 18 months or so, I've been having a mini Nirvana revival, and they did make some awesome music.
As for Kurt - spokesperson of a generation? Not at all! He's not freaking Bob Dylan (heck, even Bob Dylan wasn't the generational deity he was made out to be), but did have one hell of a voice and did write some seriously wicked tunes. I think had Kurt not died though, that Nirvana would have sort of flamed out, as I feel they were sort of on a downward slope at the time - for me, In Utero didn't check all the boxes that they're previous albums did, but I'm sure it probably resonated better to the britpop culture you had over here than the original Seattle grunge scene.
just my 2p