The book I wish I had been given as a ten year old but actually first read last year (at 38) is The Dolls House by Rumer Godden. That book has the most evilly villainous villain and I know I would have loved it as a child.
I also wish I had been given a copy of Stephen King's The Eyes of the Dragon, the story he wrote for his daughter Naomi.
Books I did read as a ten year old and think every ten year old should read are:
The Great Ghost Rescue by Iva Ibbotson, because on the surface it's a great story that really gets your imagination going, but it also has some very good ethics to teach without seeming to do so.
Also Grinny by Nicholas Fisk, which was my first proper 'horror' book as a child. I actually stole this one from my brother and denied it for years. He actually had a ten year old daughter himself before I finally admitted to the theft and bought her a copy of her own. I still have his copy though, he's not getting that back 
Ballet Shoes is a wonderful story and I loved the Fossil sisters as a child.
The Amazing Mr Blunden, which was about ghosts and time travel and was absolutely gripping to me as a child.
And Mrs Frisby and the Rats of Nimh, which is a classic that fully deserves the name. I read and reread that book over and over as a child and have made sure it's on DS's bookshelves ready for him to discover too.
I had a book of poetry called A Light In The Attic by Shel Silverstein that I still buy and give as gifts to children now. And I still have my copy. Great poems and illustrations.
Someone Might Hear You by Robin Klein was a great book that I read when I was ten but then tracked down to reread as an adult and I think it still holds up very well. I can remember being frightened and angry with the story and getting very involved in it.
I was also given a copy of Susan Coopers The Dark is Rising first, even though it is the second book of the series, and I still love it today.
And I stole a copy of Animal Farm from the same brother I stole Grinny from. I think ten is a great age to read that book and I still have it and still read it.
I loved Roald Dahl as a child, so I'm sure that had they been writing then I would have loved David Walliams, Guy Bass and Andy Stanton as well. DS is loving the Stitch Head books by Guy Bass and I have to admit that I am too.
Of the books in the shortlist, I would give my ten year old self a copy of The Skull in the Wood by Sandra Greaves as it sounds just my sort of book (then and now).