OK, I get what you mean, now but this:
"but his own selfishness causes those around him to pay."
gives the sense that it's ongoing, but my point was that it's not. It's the background incident that drives him and his decisions. I get what you mean, but Grecian Tragedy often has characters who are doing 'great things' but are constantly doing those very things 'wrong' or end up harmful due to hubris and ego. Peter Parker doesn't, he downplays it all, because of what happened to his uncle. Which actually isn't his fault. It was just ONE decision, in a lifetime of many others, which he had no idea would happen. Unfortunately, unlike Grecian Heroes, he took the blame and built his entire superhero career around preventing and atoning for it.
I guess what I'm trying to say is that unlike Grecian Tragedies, Spiderman's tragedy is his starting point. And not the ending point of a long list, which is often what happens to Greek Heroes, often because they don't see what it is they've caused.