Terry Pratchett: Tiffany Aching books (Discworld) and Bromeliad Trilogy
Patricia Wrede: Sorcery and Cecelia, Thirteenth Child, Dealing with Dragons, Mairelon the Magician (and others in those series)
Andrew Clements: Frindle and lots of others
Zilpha Keatley Snyder: Green Sky trilogy
Those are my favorites, but we have a whole room full of kids' books for my daughter, and I read those, too. Lucy and Stephen Hawking have a series that starts with George's Secret Key to the Universe. Nick Bruel's Bad Kitty books are family favorites. I think the Fairy School Dropout series by Meredith Badger is charming and funny.
So, yes. A good children's book is a good book.
Snafu - Interesting topic for children's literature. Good luck with that.
*Edit* I should mention the Curious George books too. Never really got into them as a kid, but my students adore them. I exploit H.A./Margret Rey's writing style to teach simple past tense.
The history is interesting, too. The Rey's dramatic escape from the Nazis, and the later addition of Margret's name as the author. She wrote them and he illustrated them, but the field of children's literature was dominated by women so they used only his name, in hopes of generating sales.