Dragons

I'm very partial to How To Train Your Dragon.

I'm commenting here for the sole purpose of discouraging anyone from watching the Eragon movie. It's so bad. Like, you know how the Avatar movie was widely considered the worst big screen adaptation? It pales in comparison to how inaccurate, and how poorly the Eragon movie portrayed the book. The actors actually did do a fair job, but the issues were well beyond anything that great acting could have fixed.

They missed and cut out far too many important plot points, so many that making sequels based on that movie would have been completely impossible unless they were willing to write an entirely new story from scratch

They failed to capture any significant character development

They excluded the vast majority of characters, and most of the ones that they missed went on to become integral parts of the series later on

They portrayed the movie as pg-13 at best, where central plot points and character development hooks happened SPECIFICALLY because of the brutality and bloodiness of the war that was raging

and...that's just an overview. I have been a fan of these books since i was in like second grade, and at every single turn of the movie something was beyond wrong. They didn't get any single thing right, other than MAYBE the visual portrayal of the Sword that Brom gave to Eragon, Zarok. (misery)

TL;DR: The movie is awful, don't watch it. The books are absolutely delightful, and I highly recommend reading them. I'm also very much so looking forward to the adaptation that's currently being made by Disney, with the author of the books working closely on the project and as a producer.

Damsel just came out this year. Haven't seen it yet, but the trailers looked good.

The d&d movie, honor amongst thieves has a damn fun dragon scene in it, and it's more than a simple one-off imo. It's borderline though, might not be what you're looking for exactly, but worth watching. There was also an older d&d movie that was built around dragons. As a movie it was kinda meh, but the dragon parts were decent. That's the one that wasn't on the syfy channel. The TV one was meh across the board.

There was eragon, but I've never seen it. A lot of people that were fans of the books hated it, but maybe someone coming to it fresh wouldn't.

Dragonslayer is much older, it came out when I was a kid. So, don't expect great effects by modern standards, but it's an awesome movie.

There's the Hobbit movies. The Dragon, Smaug is central to the story, though not present until the end.

Reign of Fire was pretty damn good at the time, though I don't know how well it holds up. But I still like it enough to watch it now and then.

Oh! And dragonheart! A brilliant movie that absolutely holds up.

Those are the ones I can think of.

Now, I didn't mention any animated ones. That's because I don't really think most of those do Dragons justice, not the ones that meet the featured criteria anyway. Like, Pete's Dragon is awesome, a great movie. It just isn't what I think of as a dragon movie. Same with Spirited Away, which has a dragon as very integral part of the story, but it isn't a dragon movie in the same sense as The Hobbit is.

But, if you want animated options, those two are a great place to start.

Obviously, there's also the game of thrones stuff, but that's series, not movies. Great dragon scenes for sure, and they're integral to both series.

Reign of Fire scratches a particular itch that’s just neat for “dragon apocalypse in the modern day”.

Dragonslayer is classic 80s fantasy cheese complete with a grand battle on a mountaintop between an ancient wizard and the dragon itself, VERMITHRAX PERJORATIVE.

How To Train Your Dragon 1 and 2 are absolutely gorgeous with beautiful soundtracks, fun characters, and a story that goes straight for the heart.

Well not a movie, but House of the Dragon has some of the finest dragons I've seen in motion.