Any guesses on how Dragons would look like the most realistic way possible?

I've always thought, since learning how the aesthetics of Dinosaurs were, that they had at the very least feathers to resemble a bird-like figure. For the fire i'm not sure they would have it but.. never say never, we are creatures that adapted to a specific planet's ecosystem, there is still the chance of us not knowing some specific cases.

4 Paws dinosaurs wouldn't be likely to exist in reality due to their already very heavy body tied with the fact their wings should be so big to carry all that weight because of the disconnection they have beetwen the wings and the arms. Chinese artistic and mythological style dragons maybe? But i'd argue they would definitely live underwater and be adapted to that ecosystem.