Songs/bands/music with flawless structure

[Eeric]

Sonata Arctica - Unia
Mercyful Fate
Circus Maximus
Cradle of Filth
Mercenary

 

[Hypnos]

'Tide In, Mind Out' from Alchemist is a song with a flawless structure. it's on their Organasm album

 

[RedinTheSky]

Frank Zappa - Waka/Jawaka
Shape of Despair - Illusion's Play
Gorguts - Obscura

What would be a wrong recommendation anyways ?

 

[Allfader]

Very subjective thread...

Some suggestions:

Arcturus
Death - specially since Human to The Sound Of Perseverance + Control Denied album.
Covenant - Nexus Polaris
Vader
Empyrium
Testament - The Legacy, The New Order, Low, The gathering and TFOD.