Okay, so I just watched the charlie rose with stephen colbert where he is FOR ONCE, NOT IN CHARACTER!
Observations:
--> He is a "thoughtful" communicator who thinks through his answers. I think some people mistook this for him being an introvert. I think an extroverted NF or NT could be capable the same way.
--> He seems to be far more concerned with passion, affecting the feelings of others and "performing", than he does with "deconstructive irony". He is motive over structure and collectivist over utilitarian. He is an NF.
--> Although he states that he got his comedic "start" in improvisation, he still strikes me as more Fe than Fi. His desire to take on a world view in order to affect others strikes me as a Ni-Fe perspective. Its not about exploring every possibility, but complete transformation into a different paradigm, for the sake of humorously affecting his audience.
--> His pace, phrasing, and mannerisms are identical to my INFJ uncle (bad example of evidence I know

)
INFJ
Additionally
--he is a "Classically trained" actor who actually wanted "to be hamlet, rather than simply portray or understand hamlet".
--he focused on "Serious" acting for a long time until he "gave in" to his comedic talents
--he is the first in his family to say "colberrrr" rather than colbert, because as he says, he inherited the pretentious gene haha
Jon Stewart
--Colbert described John as deconstructing the news and pointing out ironies (vs Colbert's strategy)
--Colbert described John as having a comedic mask of sorts (not as loud and outgoing in real life)
--Colbert joked that his wife knew john before (she was an actor) and she described him as quiet and not funny...yet.
--Colbert said that despite what people say, John is very charitable in trying to figure out what people actually wanted
to say (conservative or liberal).
XNTP John seems to be XNTP in MBTI terms, but in Big 5 terms he would be agreeable over egocentric, and therefore comes off as "softer" and "nicer" than a typical "T". I think he is ambiverted