Memento
Shutter Island
Inception
Se7en
Pulp Fiction
Reservoir Dogs
Fight Club
Good Fellas
Silence of the Lambs
The Departed

Paterson

Off the top of my head, "The Princess Bride" and "Stand By Me".

Prisoners is a crime / kinda horror movie but is the best one I would think. The acting is really fantastic and the plot makes you really interacted with the film.

Are arthouse films okay? It's a little hard to find things that balance lightheartedness and intensity that well.

My suggestions are going to be heavy on non-English cinema, but try The Vertical Ray of the Sun, Tokyo Godfathers, Our Little Sister, The Truman Show, Coraline, the restored version of the German Metropolis, The Girl Who Leapt Through Time, Wadjda, and The Martian. If you have to pick just one of those, I think the Truman show fits your criteria for depth/coming of age/not too tragic quite well.

Baby Driver
Bad Times at the El Royale
Bird Box [Thriller/Horror]
Celeste and Jesse Forever
Colette
Jungle

cloudy with a chance of meatballs, storks, boss baby, moana, next gen, home, over the hedge, coco, secret life of pets, charming, angry birds, emoji movie, sausage party, trolls, tangled, bigfoot, trolled, ploey, incredibles 2, luis and the aliens, deep

The Fountain

I saw Bumblebee today. It was quite good. And it might fit into some of the criteria you are looking for. And, with the exception of one or two things, it is practically period perfect.

The Lobster
Prisoners
Birdman
Nightcrawler

Ever seen Moonrise Kingdom?

Instructions Not Included

Willow
Labyrinth
The Wizard
Enemy Mine

Miracle on 34th Street

La fuga del paralítico

4 up is instructions not included. Quick off the top of my head are "Batteries Not Included" and "One Flew Over the Cuckoo's Nest." One that breaks the rules but I love because it is entirely a genre unto itself is "The Cabin in the Woods." 2/3 of those the end of the movie makes the movie so...

Love Always, Santa. I found it adorable.

Edit: More titles.
City of Angels
A Christmas Kiss II (Better than the first, but the first is also OK.)
Albert Nobbs
Hats Off to Christmas!
A Werewolf Boy
A Man Called Ove
A Single Man

Kinda hard to recommend so broadly to strangers... to name a few I like though:

• Farewell My Concubine
• Spring, Summer, Fall, Winter... and Spring
• When Marnie Was There
• Raise the Red Lantern
• Eat Drink Man Woman
• The Great Beauty

Nueve Reinas
Good Will Hunting
In the Heart of the Sea
Great Expectations
Los lunes al sol
Seven Years in Tibet
A River Runs Through It

Isle of Dogs
Blind (Swedish one, and don't read anything about it)
12 Angry Men
The Big Blue
Dark City
Ender's Game
Limitless
Yes Man (and a lot of other Jim Carrey movies)
Big Fish
The Blues Brothers
Something with Bill Murray
Catch me if you can (or other movies with Tom Hanks / Leo DiCaprio)
The Big Short (it was better than I expected)
Billy Elliot
Looper
The King of Comedy
Barton Fink
Ok, that's enough, I could go on for hours

I'll give it a shot

• The Florida Project (I feel like this is what you're after)
• Mid90s (or this)
• Good Time
• Stand By Me
• The Perks of Being a Wallflower
• Chef
• Kubo and the Two Strings (or maybe this)
• Lost in Translation
• A Serious Man
• Stardust (Similar to the Princess Bride)
• About Time
• Pan's Labyrinth
• The Pursuit of Happyness
• Isle of Dogs (2018)
• Atlanta (TV Show)

In no particular order

But why can't you have both?

• American Animals 2018 One of the best films this year in my opinion (

How did I do?
and if you got any suggestion for me that would be cool too

Saw Bronson a few weeks ago. Solid movie.

Pi π

I'm about to watch interstellar for the first time maybe that's good?

The Lord of the Rings, Extended Trilogy! :D