Okay, as far as fathers in comics who are total assholes? This guy. He TURNED KOLE'S MOM INTO A GRASSHOPPER. And as long as we're on the chemical tanks thing, I'd add: what was it with parents experimenting on their children? Although I might be misremembering Cyborg's origin, but what I recall is that in some ways it wasn't that far from this.
Actually, I wonder if this was Wolfman's veiled way of talking about child abuse, psychological and physical.
I propose a theme week, by the way: Bad Fathers(or just Bad Parents) In Comics. Anyone up for that? God knows in DC comics alone you won't run out of examples...