I had completely forgotten that anything by Tom Rob Smith is also bloody superb. There just isn't enough of it
Child 44, Secret Speech and Agent 6 are a great trilogy and not done justice by the film in my opinion.
The Farm is an incredible stand alone novel
100% this. I love the Puller novels and have completed the back catalogue of Reacher.
I also like the Bosch books (I think the first 10 or so were great and then it struggled a bit).
One other author I love and have got in to lately is Peter May. His Lewis trilogy is brilliant, Runaway is...