Some of the Roy Grace ones are quite gory imo. There are a couple of images that I can still remember - I always think he deliberately tries to have one creatively memorable gory incident in each book. Admittedly it doesn't stop me enjoying them!
Denise Mina is good I enjoy trying to guess if any journalists we both know have inspired any of her characters but Field of Blood is about children.
I liked Rosamund Lupton's Sister.