Sabriel by Garth Nix (there is a trilogy and more bits of series but book 1 stands alone)

Poison by Chris Wooding

Anything by Frances Hardinge but perhaps especially the Lie Tree or A Face Made of Glass

Frogkisser by Garth Nix (a really just good fun book with loads of subverted fairy tale tropes but in the best possible way)

Uprooted by Naomi Novik (this one is adult rather than YA but it reads very easily. I adored it)

These are all absolute favourites of mine, hope you find something in there that sparks your interest!