Give me your top 3 metal subgenre and your top 3 bands under each of the 3 subgenre

Black Metal

1. Funeral Mist
2. Faidra
3. Mānbryne

Sludge

1. Crowbar
2. High on Fire
3. Thou

Post Metal

1. Neurosis
2. Cult of Luna
3. Absent in Body