If the "Vessel" was created, or someone augmented -- modified. Orochimaru is the closest candidate to achieve that. His experiments are still operating. But I think if he's actually behind the Vessel, I don't think it was something for his own evil gain, there is a possibility it was "commissioned" by Kara, probably by an Outer by The Inners instructions, and promised Orochimaru a fuckton of money or certain knowledge to do it and not tell anyone, and Orochimaru agreed.
I don't think Orochimaru is "evil" anymore, but I'm pretty sure he still has a presence in the criminal underworld.