You might like Susan Hill's Simon Serrailler series. I love them - always banging on about them on here But they are good. And there's plenty of them to keep you going.
The series starts with The Various Haunts of Men and I think they will appeal if you enjoyed the two Robert Galbraith novels.
Also, you might like The Murder Bag by Tony Parsons. I enjoyed that very much too - it's the first in a series he's writing. I think the second in the series is either out now or very soon. So another one to watch. It's very much in the same kind of genre as the RG novels.