ProPublica is pretty close to what you want. Other than that: The fluff you're complaining about has the fantastic benefit of being pretty cheap. Op-eds don't

ProPublica is pretty close to what you want. Other than that: The fluff you're complaining about has the fantastic benefit of being pretty cheap. Op-eds don't need days of calling people or at the courthouse. These parts of publishing may also work much like a non-profits advertisement, in that they look like a terrible waste of money that could be put to better use. Yet they bring in more than they cost, and are therefore in your interest even if you (don't want to read them/weren't attracted to the charity by the ad)