People talk about Neil. But Keating helped the others, no?
The ending saw all of them stand on the desks, defying the headmaster. Ethan Hawke’s character was the first to do it, a marked contrast from his diffidence from the beginning.
The ending implies that Keating had a significant, positive on all of them. Neil is the only one who didn’t get a positive end.
So Neil committed suicide, which some blame on Keating (though the argument is shaky here). But I think it’s almost undisputed that Keating has a big effect on the others. Therefore, Keating = good