I agree with PPs who have mentioned the Jackson Brodie series by Kate Atkinson- they fit the bill of 'like Cormoran Strike but better written' (sorry, Jo! I do love you!).
For fairly light crime fiction, I would recommend:
The Act of Roger Murgatroyd and A Mysterious Affair of Style by Gilbert Adair
An English Murder by Cyril Hare
The Affair of the Bloodstained Egg Cosy, The Affair of the Mutilated Mink and The Affair of the Thirty-Nine Cufflinks, all by James Anderson- these are SO brilliant and deserve to be far more well-known than they are.
Magpie Murders, Moonstone Murders and the Hawthorne series by Anthony Horowitz
The Appeal and The Christmas Appeal by Janice Hallett
The Marlowe Murder Club series by Robert Thoroughgood
Eight Detectives by Alex Pavesi
The Murder Most Unladylike series by Robin Stevens- yes, they're for children, but I love them!
Out of interest, @StalkerEx, why do you say 'apart from Agatha Christie'? Have you read all of hers, or are you just not a fan?