As for born-in-game sims, I have quite a few.
My sims Onyx and Amelia (the sims in my avatar) had a son that turned out pretty good-looking:
https://i.imgur.com/NQ6Tpbs.png
Their daughter Kiera is pretty cute too, even though she has some kind of unique features:
https://i.imgur.com/O5bqSfs.png
Amelia was adopted as a baby so I'm not sure if she's considered born-in-game, but her brother Alexander was born in game and he's cute:
https://i.imgur.com/To6Efyx.png
Alexander's daughter, Alesta, is very pretty:
https://i.imgur.com/Ko17dAs.png?1
I have lots more I may post later if I can find some good pictures of them.