Middlemarch is a chunk so it'll take you some time to read.
If you like mystery, you could give Wilkie Collins a go.
I would second the recommendation of Wilkie Collins:
The Moonstone and
The Woman in White are both fantastic and very engaging.
Middlemarch is brilliant and, yes, it will take you a while to get through it, but it's a must read if you're wanting to immerse yourself in writing from the period. Also,
Vanity Fair might be an option. Obviously, I'm only naming English-language writers, which doesn't quite fulfill your request. Sorry.