I think ISTPs make the best heroes. I'm not sure why. I think it has something to do with the following. This is how I see the types. Tell me what you think!
INTJ(the judge): Acts unemotionally, is very independent, and very reflective and precise before making an action. Interesting when Fi shows with Te lead by an Ni strategy, belief, or vision. This tends to follow a lawful/neutral-good alignment. Makes a good hero only if their Fi is quite strong and in resonance with the feelings of those around and close to them.
INFJ(the referee): Same as INTJ, except more emotionally engaging. Usually strongly believing in an ideal of how to fix human corruption or just fight against it. Tends to become a martyr and isn't particularly active to watch. I would say lawful/neutral/chaotic-good alignment.
INTP(the eagle): Too detached from people. Is more spontaneously active than an INTJ, but is only loyal to those very few close to them. Does not really understand or enjoy people. And does not care at all what happens to those outside their scarce inner-circle. More than willing to sacrifice everything outside their circle for greater understanding or to uncover something about existence they didn't understand before. Not exactly a hero in this regard. More of a neutral-neutral/evil/good alignment.
ISTP(the tiger): Detached and independent from people to protect the self and stay away from human corruption. Will use their their knowledge, talents, observational skills, and physical strength to remain independent and skillfully help balance the corruption of humanity with their internal values and belief of 'what goes around, comes around'. Is most thought of as a quiet tiger saving its energy for the right pounce or situation to act. Probably can fit chaotic/neutral/lawful-neutral/good alignment. If they are thought of as being in a bad alignment it is usually not the case and their Ti has just reasoned a set of rules or protocol that others deem bad, when in fact it is an affect of 'what goes around, comes around'. This type tends to have many faces, all with deep-rooted philosophies, logic, and talents that give them an edge and determined-direction in situations. This is fun for people to ponder about in a film or in person. You wait to see how they will respond to a situation you wouldn't know what to do in yourself. Makes an interesting and lovable hero.
ISFP(the free bird): Wants to feel connected to the harmony of the world. Will look for that harmony and will not usually enjoy conflicts. The more conflicted their lives, the less sure they become about themselves. They make a better tranquil mother-nature figure that protects, supports, and encourages people. Because they don't enjoy conflict, they will harbor it inside until it explodes around them in a global disaster fashion. Can make a good hero if massive change is seen as a positive thing, but they will always feel unsettled when reviewing past conflicts, no matter how they turned out to them. Probably a chaotic/neutral/lawful-good alignment.
ESFP(the actor): Usually sees life as a moment of experiences and seeks to maximize the enjoyment of such. Will play any role that is needed of them by another person as long as they feel they are living their lives like they are playing and enjoying many roles of the play of life. New experiences are the best source of optimism and fun for them. This type is also often a source of a good hero. The viewer becomes sucked into their experiences and relenting energy and optimism in everything they do. People tend to hate to see such a spirited person lose to the world around them, and if they must go down to the others around them, it is often of a samurai high-spirited reproach. Perhaps it is an inherent human desire to want to feel and express their emotions without fear of consequences that makes these types so fun to see as a hero. chaotic-good alignment.
ENTP(Mad Scientist - Dr. Strangelove): This type usually sees the world as a sandbox of possibilities - and the best way to have fun with ideas is to smear Fe all over it. They like to excite themselves with possibilities and play the little angel and devil in your ears. Making something happen isn't as fun as it would be unless they are able to express that something to the world or have fun expressing their thoughts and ideas to others. If you put all the types in an empty room with a big button in the center that they had to jump on to press, the ENTP would be the first one to speak about the possibilities of what the button could do with extreme glee in all the horrible and wonderful things the button could do to them. If given a choice to leave the room forever and never know what the button does or press the button and find out, an ENTP would most likely have to PRESS THAT BUTTON. Probably a chaotic-evil/neutral/good alignment fits them best. Not really a good hero because no one ever really can tell if they are good or not.
ESTP(The Adventurer): Like the ENTP, they seek to use Fe in their lives. But they aren't so interested in the possibilities of what the button will do as much as they are about those interesting people they enclosed with and the fan duct on the ceiling that they could crawl through and escape before the crazy ENTP decides to jump on the button. Would make a good companion for experiencing the places previously unknown. Is probably most suited for adapting to a new environment and will be the most resourceful in doing so. Probably can fit neutral/chaotic-evil/neutral/good. Makes a good hero when the ESTP is allowed the freedom and excitement to act how they want. They won't forget this and will feel happy protecting those that let them feel so alive, even if that means shortening their life.
Okay, this is taking forever. I'm going to stop here.