Kurt Cobain was just one person. I don't personally think Nirvana were the best representatives of grunge, Mudhoney, Tad and Melvins were far, far better live and their shows were just non stop explosive energy.
GNR were pretty much done by then, they'd passed their peak and were on to thar awful punk covers album which was just crap.
I saw Aerosmith live at Donnington monsters of rock in 1994 and they're good but those power ballads really get boring quickly. We decided it was time to go for a burger about 20 minutes in to their set. On the bright side, they were infinitely better than Extreme who absolutely bombed