If you want to feel good doom metal, yet very miserable to the point of draining your life, Apostle Of Solitude is sure to accomplish this depressive task for you.
Atrum Tempestas, an eclectic doom metal/atmospheric band from Finland play melancholic, tripped out metal with so much emotion, it is bound to bring tears to your eyes.
Angellore play a depressive and atmospheric form of doom metal with goth metal thrown in for good measure. Musically, it is dark yet poetic in places, kind of like My Dying Bride.