I watched Zootopia the night of the election. It helped.
I will also suggest The Shawshank Redemption.
“Hope is a good thing, perhaps the best of things.”
The Gods Must Be Crazy
Predator
Commando
Beverly Hills cop
The Miracle Worker, the version with Patty Duke as Helen and Anne Bancroft as Annie.
The Wizard of Oz
Priscilla, Queen of the Desert
If your TV is big enough to make captions look OK, or you speak French, The 4 Adventures of Reinette and Mirabelle.
A movie that always cheers me up, but maybe isn’t everyone, is John Sayles Return of the Secaucus 7.
Then, there are several hysterically funny screwball comedies from the 1930s:* My Favorite Wife*; The Awful Truth; Bringing up Baby; and the funny but also poignant* Ninotchka* (tagline: “Garbo Laughs!”)
I think I am going to watch one of these now. I have files of all of them.
Black Mirror - Season 3, episode 4 - San Junipero
Ink (Not on netflix sadly, but wonderful ending)
Amelie and Happenstance.
But mostly* Amelie*.
This is somewhat of a sidenote, but I’m curious if anybody here is like me regarding this episode.
The OP may share your sense of San Junipero, as it seems many people do - I’d seen so many others specifically mention the San Junipero episode of Black Mirror when the new season came out, saying it makes them so happy, that I rushed to watch it. Gotta say, it had the opposite effect on me. I came away very sad and even somewhat angry. Not real anger-anger, but like a diffuse sense of profound regret. Because I do agree it’s very cool (won’t give any spoilers) but because of certain things in my personal history I couldn’t get it out of my head for days after, thinking “why couldn’t that be real and have been around when I needed it?”
If I can step outside those thoughts, it’s a very cool concept, though. The OP is getting lots of good recommendations.
Grand Canyon with -
Danny Glover
Kevin Klein
Steve Martin (playing it straight)
Sounds boring. It’s not. It’s wonderful and overlooked.
Some dark parts, but it all works out in the end.
Lost in Translation with -
Bill Murray
Scarlett Johansson
Funny, cute, and touching. The ending is what you make of it.
eta - Bird Cage with Robin Williams.
Always for Pleasure - A Les Blank documentary about New Orleans. Great fun.
Garlic Is as Good as Ten Mothers - Another Les Blank documentary, this one about the stinking rose.
Love most of these, especially Amalie, Local Hero, Cinema Paradiso…
But I’ve been coping by watching silly comedies. Like Rat Race.
(John Cleese bribes a bunch of comedic actors to remake Mad Mad Mad World, but quirkier… you see, Cuba Gooding Jr. is a disgraced umpire who’s driving a busload of Lucille Ball impersonators, and Kathy Bates tries to sell a squirrel to Whoopie Goldberg, while Wayne Knight and a heart-in-a-cooler pick up Rowan Atkinson who’s an Italian narcoleptic…)
I’m coping with the world not making sense now by saying “Hey, it never did!”
The Kid with Charlie Chaplin is good, any Indiana Jones flick, Lock, Stock and Two Smoking Barrels, Erin Brockovich, This Is Spinal Tap, Slumdog Millionaire, and Shaun of the Dead.
I was about to recommend Hot Fuzz, which I think I could watch on endless loop - escapist but uplifting and REALLY WELL WRITTEN. Everything comes back to be a joke or plot point.
Apart from the ones mentioned below, the old Screwball Comedies have always had an alleviating effect on me. The same goes for the classics by/with Harold Lloyd, Buster Keaton, Stan Laurel & Oliver Hardy and, of course, Charlie Chaplin.
10 Things I hate about You (1999)
Heath Ledger, Julia Stiles, Larisa Oleynik
A Fish Called Wanda (1988)
John Cleese, Jamie Lee Curtis, Kevin Kline
A Life Less Ordinary (1997)
Ewan McGregor, Cameron Diaz, Holly Hunter, Delroy Lindo
About Time (2013)
Tom Hughes, Domhnall Gleeson, Rachel McAdams
As Good as It Gets (1997)
Jack Nicholson, Helen Hunt, Greg Kinnear
Big Fish (2003)
Ewan McGregor, Albert Finney, Billy Crudup
Die Feuerzangenbowle (1944)
Heinz Rühmann, Karin Himboldt, Erich Ponto
Dogma (1999)
Ben Affleck, Matt Damon, Linda Fiorentino
Grosse Pointe Blank (1997)
John Cusack, Minnie Driver, Dan Aykroyd
Groundhog Day (1993)
Bill Murray, Andie MacDowell, Chris Elliott
His Girl Friday (1940)
Cary Grant, Rosalind Russell, Gene Lockhart
How to Steal a Million (1966)
Audrey Hepburn, Peter O’Toole, Eli Wallach
Kiss Kiss, Bang Bang (2005)
Robert Downey Jr., Val Kilmer, Michelle Monaghan
Kleine Haie (1992)
Rufus Beck, Jürgen Vogel, Gedeon Burkhard, Meret Becker
Support Your Local Sheriff (1969)
James Garner, Joan Hackett, Walter Brennan
The Philadelphia Story (1940)
Katharine Hepburn, Cary Grant, James Stewart
The Princess Bride (1987)
Cary Elwes, Robin Wright, Mandy Patinkin
Trading Places (1983)
Dan Aykroyd, Eddie Murphy, Jamie Lee Curtis
Bienvenue chez les Ch’tis [Welcome to the Sticks] (2008)
Kad Merad, Dany Boon, Zoé Félix
What’s Up Doc (1972)
Barbra Streisand, Ryan O’Neal, Madeline Kahn
When Harry Met Sally (1989)
Billy Crystal, Meg Ryan, Carrie Fisher, Bruno Kirby
Wir können auch anders (1993)
Joachim Król, Horst Krause, Sophie Rois
Wristcutters. A Love Story (2007)
Patrick Fugit, Shannyn Sossamon, Shea Whigham, Tom Waits
The 2012 Japanese film Fish Story never fails to make me smile whenever I think of it. Several stories run concurrently from the 70s to current, linked by an obscure Japanese punk rock single that might just be the key to saving the planet. When the chain of coincidence was revealed in the last 2 minutes I actually cheered 
Just lovely 
I’m not good in this category, but *UHF *with Weird Al and Michael Richards (Kramer) never fails to make me laugh and feel better.
Another sports movie: Chariots of Fire
Recovering after the worst happens, and it’s funny, too: Truly Madly Deeply
Harvey
Hugo Hugo Cabret, train station, cinema, marvelous
Cousin, Cousine, the French version
Tall Blond Man with One Black Shoe
Crocodile Dundee
My favorites when I want to feel uplifted:
Ferris Bueller’s Day Off
To Wong Foo, Thanks for Everything, Julie Newmar
The Lion King
I liked The Farmer Astronaut.