All of them involve genetics. Just because half the genetics come from a supernatural entity doesn't mean it isn't genetics.
Are you kidding me?! Shadow is literally half-god. His father is Odin! And I never brought up muggles. I mentioned Hagrid who is genetically half-giant, and there were two of those in the books, and Fleur who was part veela and had supernatural charisma from it. Aragorn's abilities are absolutely racial and he doesn't get stated as a half-elf. He gets Dunedain/Numenorean which have a different bloodline than half-elves. I'm also not sure what that comment about Aquaman means. You asked for examples of half-races in media, not D&D races in media. Aquaman qualifies 100%.
Just going off the top of my head I named 45 if you include the multiples in the books, or if you only count those as one instance, 14 instances. And I guarantee you I could find a ton more if I did any kind of research.
Half races are all over media, and they generally have a mix of abilities from their parents.