A Curious Incident of the Dog in the Night Time
It's terrific but I think best for age 13-14+. Frank talk about how lovely wanking is (wanking proper with a mess), for instance. In the context of a lad who is socially restricted in ways no child would grasp without firsthand experience.
Same For My Sister Lives on the Mantlepiece; terrific read but well hard, is your 11yo really mature enough to deal with the recurrent racism and maggot dick comments? Never mind when the poor lad's cat dies.
And both those books deal with parents who seriously, repeatedly, let their kids down, I think they're more difficult emotionally than any Jacqueline Wilson.
come to think of it, my 13yo is about ready to read those, maybe I will fetch for him now. I haven't heard of most the items on OP's list so will file away for the other bookworms.
My girl likes classics but DS usually not.
With 11yo DS I could have tried The Hobbit, Hitchhiker's Guide to the Galaxy, Horrible Histories, Watership Down, Swallows & Amazons (book1), the Machine Gunners, The Railway Children, maybe The Secret Garden. Lighter reads would be some of the JacWilson books and the popular comics like The Donut Diaries.