Honestly I've had a great time just going down the Letterboxd Most Popular list, keeping in mind there will be a recency bias.

The first 12 movies you would see (assuming you've seen none) would be:

Parasite

Knives Out

Everything Everywhere

Joker

The Batman

Fight Club

Pulp Fiction

Midsommar

Get Out

Spider-Verse

Inception

Whiplash

Which is just a solid list of very accessible bangers with one or two more contentious ones that nevertheless give a great starting point for enjoying films.

Unbreakable - the scene where him and his son are just testing out the newfound strength by piling on more weight to the benchpress and he is just as shocked as anyone that he can just keep going. Really great, grounded approach compared to what a more 'standard' hero flick would do (throw a truck at him)

Apocalypse Now's climax comes to mind, but also this scene from maybe an hour earlier:

"I told you not to stop. Now let's go."