Wings evolve from legs though, generally speaking. This means that a four legged dragon with wings would have conceivably evolved from a six legged creature. You can get hand-wings or arm-wings, and we’re not entirely sure but think insect wings may have also evolved from legs or some other kind of similar structure.
But pretty much you can either have wings or legs/arms. You have to trade them in. That’s why the whole angel/demon thing doesn’t work either. The traditional harpies work but they’d be furry and not feathered. I haven’t worked out the wingspan for them but you could probably come up with a reasonable guess. They’d be more bat-people than bird-people, and I suspect that their chest areas would be less generously proportioned than is typically seen in the artwork. I’m not going more into the physics of that one though.
Iirc the GoT intros gave you a hint about the episode by highlighting the map areas that the episode was going to cover. But S8 ended up being so bad that it went back in time and ruined the entire series for me, so I never rewatched it and might be misremembering.
Right now I never skip the intro for What We Do in the Shadows. It’s the same every time, but the song is just too much fun to skip. I am probably on my fourth watching of that series.
I think I also sit through most of the Star Trek intros just because I enjoy the visuals.