Norman.
Rodderick is a cool character, no ifs or buts about it. But in the end he is a copy. He just can't touch Norman.
And to those who say Norman hasn't done much with Peter's identity....excuse me come again? Now whether all the stories are great or all crap, or a mix (my opinion) he has....
Killed Gwen Stacy, made Peter think he was a clone, killed Ben Reilly, killed Peter's daughter Little May Parker, turned the whole city against Spider-Man for a time, made Peter become the Green Goblin shortly, almost sell his soul, hesitate, put Flash Thompson in a coma when trying to kill him, made him break his morals to break him out of prison to save Aunt May, made Peter think Aunt May was dead, kidnapped MJ and almost killed her (ironically he has only done it once, he keeps it down to a norm) and KILLED HIS HAMPSTER.
If that ain't an ******* I don't know what is. He enjoys playing mind games with him instead of outright killing him. He in fact made it so Spidey was supposed to kill him and replace him and something along the lines of Star Wars **** but it didn't work out. Sure Rodderick is sane and would just plain kill him and MJ clean, but that is why he is not as engaging a villain and why Norman Osborn was the first villain to the screen and Roderick Kingsley will likely never though.