The Dragonheart movies are also one of my top favourites for dragon movies - more so because of the personalities of the dragons and that its more.. realistic/not a cartoon.
The first HTTYD film is a wonderful film on its own with its beautiful animation and well thought out storytelling. The second movie as well brought back a lot of what made the first film great. I only wish it stopped there.
I'm not much a fan of Disney and likewise its Dragons, so Raya and the Last Dragon would be a no from me. The story felt empty and needed to be way more fleshed out. I would have particularly liked to have seen better character development between Raya and Sisu.
One of my personal all time favourites is Tales from EarthSea. The way it introduces its characters and story on top of its gorgeous animation is exactly what you'd expect from Studio Ghibli. There is also a very Otherkin-like turn of events with one of the characters that makes this one all the more appealing. I highly recommend this one to those who have never seen it.