If you're looking for manga similar to Zanuff the Butcher, you might like these titles.
Panorama of Hell is a shocking, tortuous journey into the depths of one man's postnuclear Hell. Through the confessions of a fiendish Hell painter born in the aftermath of the bombing of Hiroshima, Hideshi Hino tells a nightmarish story, creating a manga masterpiece of black humor, stunning vision, and unflinching imagery.
A katana with supernatural power finds its way into the hands of an abused child, who uses it to erase the existence of his mother's killer. Now plagued by the voice of the man he killed screaming in his mind, Ibuki can't seem to discard the weapon - or stop killing.
This is a story of three childhood friends - Colo, Cookie, and Naomi - who grew up in a sleepy backwater town on an uncivilized planet. They struggle to get by while holding on to their dreams of leaving town and finding a better life. But can their friendship endure the tests of time? Can it withstand invading armies, broken dreams, conflicting ambitions, divided loyalties, jealousy, and even betrayal?
It is a very dark night. Under a heavy rain, a determined man sets out to track his terrified victim. The decision of Kirishima Seiichi is clear: Tonight, he will kill his wife. A year ago, he was a happy man - a successful writer, a contented husband, and a father of a young boy... at that time, everything seemed going well for him. But such happiness had to end. The day his editor put an end to their collaboration, darkness seeped into his life faster than a bullet. A terrifying descent into hell commences, page by page of what it seems to be his last novel...