Not really obscure, but a few from the progressive metal world that you may or may not know:
Voivod - Nothingface
Ved Buens Ende - Written In Waters
Virus - Carheart
Oxiplegatz - Worlds and Worlds, Sidereal Journey
At The Gates - With Fear I Kiss The Burning Darkness
Enslaved - Below the Lights
Dodheimsgard - Supervillain Outcast