Sorry, not really my generation, so I don't know enough to actually rank them.
I mean, I know the stuff you hear on the radio, but no deep cuts.
They all sound alike to me. (that's not a dis, just an outsider's ear observation)
I know grunge was massively important when it arrived.
Late 80s, hair metal was on it's last legs. You can be 5% music and 95% looks for only so long before people get bored with it.
Grunge was fresh and had an edge that the music world really needed at the time.
It changed the direction of music right when it needed it.