Harry Dresden: Somewhat rebelious, but never for the sake of rebeliousness alone (ego).
Thomas Raith: Hedonistic, pleasure-seeking. Hell, he feeds off of emotions just to live (id).
The times Harry's three-man team switches around, the other characters usually fill one of these slots (Michael Carpenter: superego, Kincaid: id, etc. If Sanya is brought into the mix, Harry is oftentimes shoved to the id, and Sanya becomes the ego.)
Id: Fitz (A consummate hedonist who loves smoking, drinking and sex)
Ego: Sam (While her characterization is all over the place, she ends up at ego by default. She's more serious and logical than Fitz, but much more openly emotional and idealistic than the Doctor)
Superego: The Doctor (Capable of making hard choices that neither of the others can make [like Mercy Killing the villain in Revolution Man)
Id: Fitz (Still the same)
Ego: The Doctor (More logical and driven than Fitz, but passionate and in constant wonder at the universe)
Superego: Compassion (Coldly logical and ruthlessly pragmatic. However, Compassion offers an interesting take on Id of all things. Coming from a society completely controlled by the media signals constantly pouring into their heads, the Remote would change opinions and actions depending on the currant mood of the collective as a whole, making them extremely impulsive)
Id: Fitz (natch)
Ego: The Doctor (Often the balancing act between Fitz and Anji's Sibling Rivalry arguments, he's the confident leader even with his amnesia)
Superego: Anji (The Only Sane Man in the team, who serves to bring both of them back to reality when they're off getting distracted. Also the most driven of the group since she just wants to get home)
Id: Trix (Hedonistic and impulsive, with questionable loyalties)
Ego: Fitz (Fitz finally graduates from Id, due in part to vast amounts of Character Development but also just comparison to Trix)
Ender's Game and its sequels have a power trio of the three major sentient species:
Buggers: Highly organized, virtually no concept of the individual, communicate psychically faster than the speed of light, very technologically advanced, put the survival of their species first but don't seek to destroy other species. (Superego)
Humans: Very high-tech, artistic, individualistic, but also prone to irrational decisions and chaos. Have a bad habit of nearly destroying other sentient species. Good overall, but can still be pretty dastardly. (Id)
Pequeninos: Very low-tech compared to other species, tied to their traditions, have a much greater concept of the individual than buggers but still less than humans, generally open-minded. Tribes fight with each other, but outside of these battles, they try to avoid conflict. (Ego)
One can group the three Wiggin children in the same way:
Peter Wiggin: Borderline(?) psychopath, extremely ambitious, driven (id).
Their victim (i.e. the poor yutz barbarian they've roped into being the person who will bring civilization to his homeworld) gets to be "Ego" as he has to put together Raj's wise experience with war and humanity with Center's cold logic and near-infinite knowledge.
Alice: Witch-to-be teetering on the edge between good and evil. Is always willing to use the dark to accomplish her aims but does not wish to belong to it. (Id)
Tom: The Spook's apprentice, always torn between his duty to his master and his friendship with Alice. He always wants to do what is right, but often isn't sure what that is. (Ego)
The Spook. Former priest who has decades protecting the County from ghosts, witches and other monsters. He is always sure of what the right thing to do is, and tries not to let mercy or human emotion get in the way (Superego).
Do we have one for The Hobbit? Bilbo, Gandalf and Thorin certainly have airs of this, but matching them is trickier than you'd think- is Bilbo the reconciliatory ego between the driven Thorin and the detatched Gandalf, or is it Gandalf between the instictual Id Bilbo and the proud, calculating Thorin? Or is it even Gandalf who is the Id, tempting the irresponsible Tookish side out of Bilbo while Thorin would rather he do the sensible thing and stay at home, out of the way of those more qualified for the quest?
Shea Ohmsford: Nice Guy and the only one to have all the information about what is going on; the only one who can complete the mission and defeat the Big Bad (Ego)
Panamon Creel: Flamboyant highwayman and professional criminal who makes friends at the drop of a hat, believes in living life to the fullets, and has a Hair-Trigger Temper that can be set off without warning (Id)
Keltset: Calm, rational, messianic figure who doesn't let his emotions get the best of him. Mute. (Superego)
The Reaper: A being forged of pure insticnt, created to be the ultimate predator. Killing is as insinctual to it as breathing; when it wants something it just keeps on coming until you or it is dead. (Id)
The Changeling: Cautious and manipulative, using its Shapeshifting abilities to confuse and mislead; waits for the perfect opportunity to strike despite being more or less driven by spite. (Superego)
TheDagdaMor: Repressed Chaotic Evil, he prefers to work through subordinates but isn't afraid to confront his opponents directly when the opportunity presents itself. A planner with the ability to be flexible. (Ego)
Robert Baratheon is devoted only to the physical pleasures of life; food, drink, sex and glorious battle! (Id)
Stannis Baratheon is cold, rational and entirely devoted to upholding justice and the laws of the realm as they are. He often feels dishonoured by his brother Robert's impulsive actions in court, or his impulsive actions in general, such as having a casual sexual encounter on Stannis' wedding night, in Stannis' marital bed. (Superego)
Renly Baratheon is more level-headed and down to earth, neither overly impulsive like Robert nor extremely strict like Stannis. However, he subverts part of the trope in that he offers no mediation between Robert and Stannis. In fact, he adds to it somewhat as Stannis percieves Robert as favouring Renly over him. (Ego)
Played straight in the meeting in A Clash of Kings between Renly, Stannis and Catelyn Stark:
Stannis demands that Renly submit to Stannis and accept Stannis as king due to Stannis, by law, having the superior claim by being the elder brother. (Superego)
Renly demands that Stannis accept him as king, due to him seeing himself as fulfilling a more romantic ideal of king, basically. (Id)
Catelyn Stark desperately tries to mediate between them and get them to come to a compromise and join together against their extremely powerful common enemy, the Lannisters. (Ego)
Also, before the series even began, the triumvirate that overthrew the Targaryens:
Robert Baratheon: Again, loud, boisterous, lecherous, gluttonous, etc. (Id)
Eddard Stark: Honorable and self-controlled, even to a fault. (Superego)
Jon Arryn: The real ringleader of the rebellion, and, as a foster father to both Robert and Eddard, the one who mediated between the two. Self-controlled, but also practical. (Ego; not surprisingly, things fell apart pretty quickly once he died.)
Then there's the Lannnister trio.
Cersei seems like the archetypal Lannister but as the books progress, we see that her scheme to put an incest-born pureblood Lannister on the Iron Throne was her own power grab and that she resents er gender because it makes her powerless. (ID)
Tyrion is loyal to the family no matter how much they hate him until book 3. (Superego)
Jaime loves his siblings. (Ego)
The Starks who made the journey to King's Landing.
Sansa is the superego because she really wants to play her role as a potential queen.
Arya is the id. She just wants to go home and always disregards her duty as a lady.
Poor Ned is the ego playing referee to his teenage girls.
Three Targaryens from the backstory. Viserys II ran the kingdom (ego) while his nephews Daeron warred (id) and Baelor prayed (superego).
The surviving Greyjoy brothers
Aeron is a dedicated priest to the Drowned God (superego).
On a mission to a world that at first seems to have the hat of pilot-worship, four of the New Republic's best pilots try to sort things out. This is possibly the funniest book in all of Star Wars.
Id: Wes Janson, dubbed "the Darling One" by Adumarians. Loves making jokes, snarky observations, believed to have very little maturity. (Really he is mature when it counts, but he mouths off a lot.)
Superego: Derek 'Hobbie' Klivian, "the Dour One". He's the group's cynic, though far from The Eeyore.
Ego: Both Tycho Celchu, "the Doleful One" and Wedge Antilles, "the Dilligent One". They're both more inclined to leadership and somewhat more serious. Somewhat. Tych is given to occasional, devastating one-liners, and while Wedge is usually there to be appalled at jokes, after he gets laid and later gets back into his starfighter he briefly surpasses Wes.
Wedge: "We have the right tools to subvert our Imperial admiral."
Hobbie: "What tools?"
Wedge: "Oh, Wes's maturity, your optimism, and my diplomatic skills."
Id: Flim, the con artist physically impersonating Thrawn; his ambition is mostly to survive and get paid. His grasp of strategy and tactics is negligible, and to keep up the deception he needs
Superego: Major Tierce, strategist, feeding Flim tactics.[[supersecretspoiler: A clone with a bit of Thrawn burning in his head]]
Ego: Moff Disra, who set the triumvirate up in the first place, provider of supplies, handler of political fallout. Doesn't really get along with Tierce, but they need each other and are undeniably effective.
Id: Ned Land (impulsive, violent, mostly concerned with food, hunting and escape)
Superego: Conseil (imperturbably calm and reasonable, cares about nothing except his master's welfare and cataloguing wildlife)
Ego: Professor Aronnax (mostly calm and scientific but also gets upset about being held prisoner; mediates between his comrades)
The book is, anyway, one massive psychoanalysis: being captured and dragged down to the depths in a mysterious vessel, to encounter frightening alien-looking creatures and to descend into a maelstrom., etc. etc. etc. ...
Willem Vanderling (Id): Adapts to the endless brutality on Sangre quite easily, becoming a murderer and cannibal in a matter of weeks.
Bart Fraden (Ego): Is willing to commit stupefyingly horrid war crimes for the sake of overthrowing the planet's corrupt elite (It Makes Sense in Context).
Sophia O'Hara (Superego): Has the most conscience of any character in the novel (though that isn't saying much). Frequently questions Fraden's "leadership" and attempts to instruct him morally, despite ultimately being ineffectual.
Id: Mommy is motherly, making decisions based on emotion, even if they are impractical or downright dangerous. She also has violent fits.
Ego: Hunter, the sole balanced member of the family, who attempts to mediate when Mommy and Teacher disagree on how to lead it.
Superego: Teacher, an introvert who spends all of her time writing in and/or studying the Book, and thinks as practically and unsentimentally as she needs to in order to protect those that she cares most about.
Courtship Rite: The three brother-protagonists, as reflected in the roles they chose in childhood.
Id: Joesai is "the loins", the tough, taciturn brawler.
Ego: Gaet is "the heart", the cheerful, carefree one who makes friends easily and always finds ways to resolve disputes.
Superego: Hoemei is "the brain", the dour, detail-oriented family administrator.
World War: the three most senior members of the alien Race's conquest fleet:
Id: Straha, third in the hierarchy, is so aggressive, radical, adaptable and short-term oriented his superior compares him to humans (not a compliment). After the conquest suffers setbacks, he tries to overthrow his commander and take over the fleet. When that fails, he takes refuge with humanity, only to later regret his choice.
Ego: Atvar, the fleetlord, tries to balance tradition and change, caution and initiative, and play off the other two against each other.
Superego: Kirel, the second-in-command, is focused on not making any mistakes, and never deviating from the path laid down, almost regardless of price or consequence.