Fortunately there is room in fandom for Sev-fans and Marauder fans, although we're required to snark at one another. It's in our union contract.
Although all three "good guy" Marauders died fighting against the forces of Voldemort, none of them actually died saving Harry. Lily did that. It's Lily, not Harry, who should get credit for the first defeat of Voldie. And it was Snape who unknowingly gave her the opportunity to do so. If not for the "Man Who Loved," there would be no "Boy Who Lived."