I'd rate Connelly's books higher than "pulp fiction", though he's definitely very commercial. I've read most if not all of his Harry Bosch novels, and was also very impressed by The Lincoln Lawyer.
If you haven't heard of Robert Crais, he's a somewhat similar author, LA-based, whose work you might also like (I think he and Connelly are friends, and I wouldn't be surprised to see a novel where Connelly's Bosch and Crais's Cole or Pike team up to some extent).
I've been reading more of Michael Dibdin's Aurelio Zen mysteries, most recently A Long Finish. These novels are Italian-based, with a high degree of cynicism. Recommended if you like, say, Bill James's Harpur and Iles books.
Recently finished Michael Chabon's Yiddish Policemen's Union, and was slightly disappointed.