Of Corbelli's excessive output, the album I tend to go back to is Morder Machine's "Deathshow". The Brighter Death Now influence is worn on the sleeve, but in Corbelli's capable hands this album, to me, encapsulates Death Industrial/Post Mortem. The sheer, fuck-you blatant minimalism of the pieces, particularly "Music For Dead Brains" which is a micro-masterpiece, and the plain darkness of the sound makes this a consistently great work.
"Basic Autopsy Procedure" follows the same kind of simple minimalism but with all the drawbacks of that style of playing, and I can understand why Peterson wouldn't be too inspired by it. "Sektion 3" is a good piece, better constructed with a decent voice sample, but the rest of it does sound too noodly, a bit like recordings of some of Corbelli's live work.
Necrophonie, Corbelli's collaboration with Devis Granziera, is another interesting project, the "SM0002" album having a somewhat grittier sound than Corbelli's usual, "617.13.12" probably being my favourite piece.
Of course all artists have their ups and downs, particularly those who release a large quantity of material. It's hard to know just how much of his material was simply driven as opposed to going through the motions, since even when going through the motions there's an impulse to create and have that creation known. Perhaps, in life, he was just simply driven and had scant regard for what was regarded as "good" or "bad".