Pleasedeteme I haven't read all of his, but I really love Oliver Twist and A Tale of Two Cities. Tale of Two Cities seems more of a classic than the former. One key to becoming a classic is to have really deep and complex themes. Which is why studying classic lit is such a helpful tool to writers.
But out of everything I read this year, I have to say that East of Eden by John Steinbeck is definitely at the top. Of course, not everything has to have big words to be a classic; My Sweet Orange Tree by José Mauro de Vasconcelos and The Little Prince by Antoine de Saint-Exupéry are also among my favorites. Really, it doesn't matter how complex your prose is, as long as you have something meaningful to say.
So while you may not be able to find the next J.K. Rowling on this site, reading classic lit and studying why these works are classics is a huge step in helping writers grow. It's kinda like having the author mentor you, in a way :).
I aspire to write works like the ones above one day, and to publish them in real life, but I still have a long way to go and lots to learn. So I'm using this site to help me practice my skills and spending time reading a lot of good books. After all, reading is the other side of writing.
I feel like I went down bit of a rabbit hole, but I hope this helps. Good luck to you on your writing journey! :)