All of Charles Todd's mysteries have been amazing, and I am saddened that more people do not know about this amazing pair of authors.
Ellis Peters deserves the recognition due Agatha Christie, imo. I enjoy her works so much. She has written prolifically, her real name is Edith Pargeter, and I truly wish I her books were more widely available.
She is very successful, but I think she is deserving of so much more attention. She is truly one of the best writers I've had the honor of reading.