Suggestions For a Dostoevsky lover.

Hey everyone, sorry I could not think of a better title. I have read Crime and Punishment and the idiot in the past year. I also read War and Peace and Anna Karenina. I liked all of them very much, especially C&P. I am looking for suggestions that align with them. It would be great if it were a philosophical novel. I am open to suggestions on philosophy too ( I find the idea of (Optimistic) Nihilism intriguing) but I have absolutely zero previous knowledge or reading here. Any suggestions are much appreciated : ).