INFJ
Bruce Wayne (as portrayed in Nolan's Trilogy).
While Bruce Wayne has manifested in diverse ways, resembling different types, through the years, Christopher Nolan's Wayne is an INFJ.
All Introverts, but especially INJs, see outward reality as negotiable. The bedrock of their reality is the internal world. Bruce, like all introverts, but especially INJs, has an internal vision, a dream, of what reality could be like. It is through this transformative power of the imagination that Bruce was able to change Gotham, when others with lesser imaginations had given up on it; they could not envision it any other way than what it was. All Introverts can act on the world to shape it according to their internal visions, but INJs are particularly apt to do so because Inferior Se impels them to put their Ni into action. This is exactly what Bruce does.
Further, while Bruce does have his vague, but compelling, notion of a master plan, he fails to plan the details, eventually becoming "truly lost." It's important to note that when he begins the process of undergoing his transformation into crimefighter, he is acting on an undeniable hunch and an overwhelming drive to make a change for the people in his world. At this point, he could still be INTJ, but Bruce is an Fe-Auxiliary because his values are so standardized, even mainstream, and his sympathies so universal. We can see the League of Shadows as a case of Fi gone wrong, an organization with a highly personalized code of ethics. Bruce is much more tied to his society's interpretations of good and evil, refusing to take any life, even when doing so would greatly benefit said society. Bruce puts people into social categories; he does not treat them on an individual basis, but passes swift judgment on them based on their status in society -- if you're a criminal, you're bad; if you're an average citizen, you're good and deserve protection.
In The Dark Knight, Bruce is so overburdened by the suffering of others that he makes the entirely irrational, emotional decision to turn himself in to the police when the Joker is still on the loose. An INTJ would not likely think this way; an INTJ would more likely make the decision via logic -- he would use Te to realize that, strategically, to turn himself in would only result in more deaths, and use Fi to back this conclusion by reminding himself that the goal is to save lives. Bruce makes his decision with Fe, feeling so emotionally connected to the victims of the Joker, not wanting even one more person to die because of him, that he will forgo the strategic, logical advantage in staying active as Batman. Such is the connection that developed Fe allots its users. As the conclusion of The Dark Knight evinces, -- he lies to the entire city -- Bruce is more about the good of everyone than sticking to personal, prioritized values.
Like many male INFJs, Bruce does not do a great job of using or expressing his Fe, shunning a social life and getting caught in Ni-Ti loops. This got so bad by The Dark Knight Rises, that he spent eight years mourning the death of Rachel, who he was in love with. He locked himself in his mansion after four or five years, and it's implied he never began seeing anyone else in the time he was functioning, because he never got over Rachel. His decisiveness and sense of closure is very J, -- "There's no one out there for me" -- and in this case indicates poor Fe. Bruce's highly personalized Thinking, Ti, is evidenced in instances where he disagrees with Te insitutions, like the Gotham Police Department. In the Dark Knight Rises, we find out Bruce is interested in logic systems like computer programming, which is often associated with Ti-users, like INTPs. This is because Ti is wholistic, and tends to take into account details and minutiae. Te is more about breaking problems into simple steps for efficiency, which means it will often miss nuance.
Bruce has moments where inferior Se takes over him, and he makes rash, momentary decisions. Like all undeveloped Inferior functions, Se manifests in a frightening way -- frightening because one notes how out-of-control the person seems when operating on the Inferior. One example is in Batman Begins, when, just after he's confronted Falcone, Bruce hears the horn of a ship and gets swept away by the moment, sneaking on board to travel to some unknown foreign land.
That wild moment, of course, is in keeping with the plan he's concocted in seemingly less than a day -- a big picture scheme: He will travel the world and live as a criminal in order to understand the criminal mind. He's not sure how exactly it will unravel, but he's thinking long-term. Dominant Intuition is known to bypass the strict facts and go on hunches; it's an almost supernatural power of the subconscious that manifests as hunches. This is what we're seeing in Bruce at this moment.
Bruce's one glaring weakness in Batman Begins is also his tendency to forget about his surroundings (Inferior Se). At the same time, he shuns sensory pleasures like food and sex, indicating the love/hate relationship so associated with the Inferior.