The longest winning streak.

[Circlepit]

Metallica first 4 surely. They are one of the few bands that always have me thinking whichever album I'm on at the time is my favourite.
They are a shoe on for a band that managed to release a string of mediocrity after some classics.

Crowbar have never released a shit album, having said that they have 5 whoppers at the start.

[Circlepit]

It's hard to think of band that had maybe 2 or 3 absolute classics, went to shit and then managed to produce another string of classics.
Decide had the flash in the pan with Stench but then went back to plodding.

[Ducky]

I find the first two Metallica albums fairly meh for a long time now. Some of RtL is top tier, but there's filler too.

[Cailleach]

I am going with Darkthrone, Opeth, Enslaved, My Dying Bride, Emperor. I cant think of any band whose quality didn't decline somewhat over the years- the closest to not doing so would be Darkthrone.

[Cosmic_Equilibrium]

I still don't think anyone's managed to beat Sabbath's first six. Metallica have four or five depending on where you start/finish at. Maiden would be a good shout if it wasn't for Killers and to a lesser extent Piece Of Mind interrupting the flow. Saint Vitus are another candidate, flawless discography for the first five albums, if you like C.O.D. then that and the following album give a seven album streak.

You could make a case for Rush having five from 2112 to Moving Pictures but considering their shitty 80s keyboard albums as classics is just demented.

[open face surgery]

If Metallica are in the running, Slayer beat it with 4 plus an EP and if we want to stretch it further, Live Undead.

[Black Shepherd Carnage]

Could include No Life 'Til Leather. Sounds like a full-on tribute to Diamond Head, but that's in large part why I personally love it.

[Carnage]

Hell Awaits breaks that, but from RIB to DI is also four.

Killers is, of course, excellent.

[open face surgery]

Absolute lunacy to include DI and DIM and not have possibly the best thrash album ever. Dunno why I even rise to this.

[Circlepit]

I didn't want to bring up Metallica as I r Jew it would come down to Slayer/Metallica

Hell Awaits is brilliant, no arguments.

The first 4 Burzum can stand up to anything out there.

[Bürggermeister]

Rainbow
Rising
Long Live Rock 'n' Roll
Heaven and Hell
Mob Rules
Holy Diver
Last In Line
Sacred Heart

Dio laughs at the suggestion four good ones is an accomplishment

[Ducky]

If Metallica are in the running, Slayer beat it with 4 plus an EP and if we want to stretch it further, Live Undead.

Yeah Slayer smoke The 'Tallica, the rest of the Big 4, and a lot of other bands in general.

I'm not a fan of HA, but I understand why it's revered, and it deserves its place.

[ldj]

Rainbow
Rising
Long Live Rock 'n' Roll
Heaven and Hell
Mob Rules
Holy Diver
Last In Line
Sacred Heart

Dio laughs at the suggestion four good ones is an accomplishment

That's a mental run when you actually write it out.

[open face surgery]

Just listening to the new Gjendød and they're now on 6 although I never went back to the last one as much.

[Eoin McLove]

The last Gjendød is great. Worth a revisit.