Gonna have to go by genre

Tech Death:

Sorreption - King of undisputed nonsense

runner up: Necrophagist - Seven

Melodic Death Metal:

In Flames - Dialogue with the stars

runner up: At The Gates - Slaughter Of The Soul

Death Metal:

Decapitated - spheres of madness

runner up: Bloodbath - So You Die

Progressive metal:

BTBAM - Ants of the sky

runner up: Opeth - Serenity Painted Death

Metalcore:

Darkest hour - Tranquil

runner up: 🤔

I could probably come up with a top 5-10 for each genre. I could probably dig for 5 more genres. This is already a sick playlist.

Honorable mentions to Rage Against The Machine and Soilwork. Some absolute riff kings. Those two bands honestly trump the whole list/thread/whatever.