Top 10
1. Iron Maiden
2. Deep Purple / Rainbow / Whitesnake
3. AC DC
4. Queen
5. Guns n Roses
6. Metallica
7. Black Sabbath
8. Judas Priest
(however bad the releases they put out now might be -which is not always the case-, I think the legacy of these bands above is untouchable. On the contrary, the bands below have actually regressed dramatically from their heyday, in my opinion)
9. Helloween (up to
The Dark Ride) /Gamma Ray (up to
Powerplant)
10. Dream Theater (up to
6DOIT)
Angra, Megadeth, Bon Jovi and Queensrÿche fail to reach the top 10 because their golden years were too ephemeral although some of their albums are among my favorite ever.
EDIT The Beatles do not really qualify for this top because either their live days did not yield so many tremendous songs (compared with the rest of their career), either those extraordinary songs were written when they were more of a studio band, the bandmates (and George Martin) being rather "lab assistant arrangers"
. The same goes more or less for Pink Floyd since
Animals: it had stopped being really a band.
EDIT2: ok, I had forgotten Scorpions. Out goes Dream Theater...