Specifically:
http://www.thisamericanlife.org/radio-archives/episode/487/h...
http://apps.npr.org/unfit-for-work/
http://www.npr.org/blogs/money/2013/05/07/182010027/episode-...
http://www.propublica.org/article/finding-oscar-massacre-mem...
* The New York Times
* The Blade (Toledo, OH)
* Willamette Week (Portland, OR)
* The Washington Post
* The Birmingham (AL) News
* The Chicago Tribune
* The New York Times
* The New York Times
* ProPublica
* Philadelphia Daily News
* Sarasota Herald Tribune
* The Seattle Times
* The Associated Press
* The New York Times
If that's not a diverse group of news organizations, I don't know what it.
That also doesn't include things like the Walter Reed Army Medical center scandal (http://en.wikipedia.org/wiki/Walter_Reed_Army_Medical_Center...), because it falls under the Public Service category: http://www.pulitzer.org/bycat/Public-Service.
Corporate, local, and state-level corruption are all small potatoes fare that is used (along with sensational stories with little actually news content) as a tool to help the orgs pretend to be doing real journalism.
Notably, the NY Times was complicit in the propaganda effort to overthrow Saddam Hussein.
Any investigative journalism that does not directly address what you believe to the most important topic (the legitimacy of the US government) is automatically not actual investigative journalism. Not only that, anything that does not address your favorite championed cause is automatically "small potatoes" that is in fact part of the conspiracy for journalists all over the country to fool everyone into believing real journalism is occurring.
Are you seriously leveling this claim?
In other news, all sci-fi TV shows are in fact not actual sci-fi TV shows because they aren't Firefly.
This has had a chilling effect on de-facto press freedom in DC. In the meantime we've seen utterly shocking things go largely unreported b/c topics are generally verboten and the press instead focuses on less consequential issues.
In comparison to the stuff that is not getting significant press, the smaller stuff is largely irrelevant to the lives of most Americans.
There are great reporters who write about everything from local sports to local corporate corruption, but the high quality of their work should not shield the major players from accountability for utterly failing in their major moral and professional duty.
[0] http://www.nytimes.com/2013/05/12/nyregion/doubts-about-dete...
Tne Stranger? Seattle Times?