Christmas Carol: and it's nice and short.
Pickwick Papers
Oliver Twist...those child thieving gangs existed and Dickens wrote it to call attention to them. He was not allowed to say it but Nancy is actually a prostitute.
Hard Times: an endictment of industrial development and the human misery therein
Nicholas Nickleby: the first half. Second half gets a bit mushy
Dombey and Son: I hated it
The Old Curiosity Shop: not my favourite
Bleak House: I don't think Dickens liked lawyers, and a great piss take of women who do charitable works and ignore their own familes. My second favourite
David Copperfield: my favourite
To balance Dickins I would also recommend Wilkie Collins: Armadale, The Woman in White, No Name and The Law and the Lady