Aside from Morlun, who obviously killed him. Electro has beaten Spidey a few times: one time he even had Spider-Man at his mercy and he had him BEG so that Electro would spare the lives of Spidey and innocent people. Another time during the Sin Eater Saga, the second Sin Eater saga I should say, Electro also beat Spidey. He didn't want to kill him, rather he left him alive to suffer defeat, but Spidey beat him two issues later. I think Electro won during Millers MK Spidey story as well. Who else beat Spidey? I don't think the Kingpin ever has, they've only fought in terms of physical combat about seven times total. The Hobgoblin once beat Spidey and the Kingpin had to save his life (Spidey's life, not the Hobgoblins.). Can anyone think of any other examples?
He's been beaten dozens of times. I wish somebody who has access to every Spidey story would sit down and do a career won-loss record for Spider-Man. I'm more interested in comic narratives than fights/powers/stats, but that would be tremendously cool.