I think I can almost do this in order from earliest childhood:
Superman -- books, comics, movies, my wallpaper as a child, I ran around with a j-cloth cape at the age of 2 until my aunt Karen bought me a red one. He personifies the best of human potential - truth, justice, kindness, problem-solving, optimism, helpfulness, intelligence, idealism.
Put Me in the Zoo -- a big cat with spots wants to join the zoo, and is kicked out. He shows children the tricks he can do with his spots, and they tell him "the circus is the place for you." It's the book I used to teach myself to read. Moral -- we all have gifts but where they're supposed to be useful won't be discovered until we see past our expectations and assumptions.
Beauty and the Beast -- the first time I realized an author could communicate ideas to a reader (rather than just tell a story for the story alone.) Moral -- character is more important than superficial appearance.
The Hobbit -- my dad had a big edition with illustrations from the animated film, so I thought it was a children's book and read it when I was five. Moral -- heroes come in all sizes, despite expectations. Lord of the Rings came later but the Hobbit is superior in my mind probably only because of when and how I encountered it.
The Chronicles of Narnia -- fantasy world, magic, wonder -- but also theological principles, and ordinary children doing extraordinary things because of their humanity, which doesn't require fantasy or magic.
To Kill a Mockingbird -- ordinary people in an ordinary place, again displaying the moral weight of all our actions -- how we treat neighbours, what we do about a rabid dog, how we treat birds, how we defend the innocent.
Who Has Seen the Wind -- God in the untamed, the unpredictable, the wild, the free.
Stranger in a Strange Land, Number of the Beast -- Robert Heinlein's fiction in general dominated my teen years, but those two books caused me to think about the nature of reality, and learn about quantum mechanics.
Jurassic Park, Congo -- science's place, the natural order, human's power contrasted with humility, chaos theory.
1984, Animal Farm -- history, politics and systems, versus human identity and freedom, and how we can use narrative and symbols to allegorize and inform.
Atlas Shrugged -- I read this in university, and I'm no Ayn Rand disciple, but while her economic theories are fuzzy, the idea that we are responsible for our actions, all of them: theological, political, economic, moral, social, still matters to me.
Shakespeare. All the Shakespeare. There is no author like him, and he's worth studying. Interweaving plot, characters, foreign and historical sources, symbolism, religion, hubris, psychology, poetry, fantasy, magic, war, violence, love, law, justice, morality and humour... infinite variety.
The Dark Tower series -- particularly Wizard and Glass -- Stephen King has fans and detractors, but Wizard and Glass is a great book, again because of layers -- western, horror, fantasy, sci-fi, romance, symbolism, characters, plot, morality, ka (destiny, fate), adventure, suspense... some of his individual books are amazing (the Stand) and some are long slogs (Insomnia) but Wizard and Glass is one of the best books I've ever read, by anyone, ever.
Worm. I grew up with comics and Wildbow has a creative output that rivals anything Stan Lee and Jack Kirby produced, and they produced the majority of the Marvel Universe. I never thought I'd see one person that could combine all the things I like -- ordinary humanity, science fiction, fantasy, superheroes, horror, plot, characters, symbolism, morality, ongoing subplots... Wildbow has the talent of being inventive rather than derivative, even in well-trod genres, and of immersing the reader in the story world such that you forget you're reading a story, it seems like it's really happening. Pact sometimes lost that immersive quality, but it's only the second story Wildbow ever published. I will not be surprised if out of anyone online, students study things by him in schools a century from now. I could be way off base, but that's how I see his ability, and I've studied everything -- Faulkner, Golding, James, Tolstoy, Dickens, Shakespeare, Hemingway, Shaw, Marlowe... he may not have written a "traditional" classic yet, but I feel he's the most capable writer I've ever had the pleasure of interacting with. Sorry to everyone else.
There are people in this community who do individual things better (For instance, Sarah Suleski can make me "feel" a character's emotions better than any writer I've ever read in my entire life) but no one person has all the tools in the toolbox the way Wildbow seems to. For everyone who has a good "hammer" -- impactful action, for instance, -- he has a hammer and a screwdriver that twists things around to surprise you. Plus umpteen other tools. It's a little scary, but it's also inspiring because he's an example of what dedication and practice can cause -- with enough time and focus, any one of us could become great.
I don't have the time for fiction anymore -- I'm raising five kids, and taking care of two churches, and doing school work, and trying to keep up with my wife. But the twins go to school in September and I'm hoping that opens up time for writing, because it's only with time and effort that we get better.
Oh, and the most important book in my life -- The Bible. It is a lot of things -- the collective memory of the Hebrew and Christian cultures, a synthesis of myth, history, fiction, poetry, songs, prophecy, dreams, letters, and lives, layers of allegory, parable, symbolism, self-reference, meta-narrative, breaking the fourth wall, theology, religion, love stories, horror stories, war stories, success stories, tragedies and comedies, it is anything but boring if you take the time to really read it. And, if you open your mind and heart to it, it can change who you are for the better. I feel like all the good books above prepared me in some way for understanding the Good Book, and in many ways it shows the power of experience -- that all our experience can be seen through its lens, and then reshaped by that encounter. All good books immerse you in a world temporarily, and then release you with some new ideas -- but the Bible seems instead to reveal the real permanent world those temporary ones hinted at. There's a place within it for all the science and all the history and all the lives and all the struggles, all the wonder of humanity.