The first Big Wheel.
When Overdrive took over the Big Wheel i actually though that was cool,but the first Big Wheel (IIRC) from the 70s its one of my least favorite Spider-Man villains.
Identity Crisis
Revenge of the Green Goblin
A Death in the Family
The Pulse 1-5
Marvel Knights: Spider-Man
Warren Ellis' Thunderbolts
Kelly Sue DeConnick's Osborn series
That's more than enough good stories, and in some cases great stories.
Harry Osborn never killed anyone as Goblin. If you don't kill people then you can't measure up to Norman.Norman reached his apex as a character and as a villain; there was really no need to bring him back, especially since Harry filled the role of Green Goblin so well (arguably better than Norman).
I’m clearly in the minority here, but I loved American Son and think that it’s one the best Norman stories in comics.
Venom when he’s a villain.