You mean musically right?
It's a tough one, but I'll go with the 90s: Nirvana, Pearl Jam, Soundgarden, Alice in Chains, Mudhoney, Smashin Pumpkins,Him, Silverchair, ... then some 80s band did really well in the 90s: Guns N Roses with the Use Your Illusion albums, Metallica with the black album, AC/DC's Razors Edge. Aerosmith put out some good power ballads too.
And then we have the punk revival with Green Day, The Offspring, Rancid, Pennywise and others...
It was a good decade for Beatles fans too: the Anthology documentary came out along with the albums and that encouraged the young people to listen them again (that's how I got into them, by the anthology!