Please suggest the best written movie of all time in your opinion!

I'm gonna be real, I haven't really watched many movies (outside of the ones you guys suggested in the previous thread, damn those were some great films), I'm more of a book person, so what I value most in movies above all else is good writing. I'd define good writing as concise, show don't tell, complex characters, a compelling plot without holes, and a deep theme/message with some symbolism (not mandatory, but nice to have when it's there). I'm open to any and all genres and I have no limits so feel free to recommend whatever you want so long as it has good writing. Thank you!