It's a very thoughtful and useful list. However, due to the very nature of list making, I am sure you are receiving suggestions for additional books. Authors such as Rylant and Saint-Exupery lend validity to the field of children's literature because their works speak to us all.
Any comments are welcome.
I am a librarian and department chair in a public school district in Pennsylvania. Our state has few requirements for staffing librarians or maintaining libraries in public school districts. We cannot find people with library degrees to fill positions. Libraries in schools are not mentioned. You're right, the jobs are there, the people to fill them are not.