Let’s make it 8 albums then!
Difficult to beat if you ask me.
Well, first of all, I'd put Maiden's golden album run at 5 albums (TNOTB through SSOASS), not 7. The Di'anno albums just aren't as good as those 5.
I do think that Rush's 7-album run from
A Farewell To Kings through
Power Windows would almost qualify if it weren't for
Signals in the middle.
Signals is a good album overall with one stellar song and one great one, but the rest just isn't on the same level, IMO. And
2112 has a great title track, but a fair amount of filler later on.
Gamma Ray's 5-album run from
Land Of The Free through
Majestic is pretty fantastic. A hardcore fan might try to expand that to include
Insanity And Genius and
Land Of The Free II for a 7-album run, but I personally think that would be a stretch.
Megadeth's 5-album run from
Peace Sells...But Who's Buying? through
Youthanasia is also pretty great. (There are many great tracks on
Killing Is My Business...And Business Is Good!, but there are a couple of clunkers as well.) I don't personally understand the love for
Cryptic Writings at all.
Some people might try to argue for Queensrÿche's 5-album run from
The Warning through
Promised Land, though I don't think
The Warning and
Rage For Order are on the same level as the next three.
Metallica had a great 4-album run from
Ride The Lightning through the black album (though I think the black album was a couple steps down musically, it was executed so well that I'm OK including it). The vocals on
Kill 'Em All are too terrible to consider that album, and
Load has way too much filler, but there are probably people who would try to argue for Metallica's early run as a contender.