...who nonetheless has solid journalistic methods.
I believe he's the face of journalists behind the scenes who do all the heavy lifting work.
See this is where John Oliver (and before him, Jon Stewart) are really duplicitous. They talk about the news in a certain way that implies that they have done their research and are delivering useful information, but they crack wise as they are doing so, in such a way that obviously fits in with whatever narrative or reaction they're trying to sell. And then when they get called out for being dishonest or biased, they say, "wait a minute, I'm just a comedian!"