Dostoyevsky still topping my list. When it comes to the style and brilliance of it I'd give it to Tolstoy since he's like the most mathematically accurate writer with beautiful sentences. Fyodor is more rough but he touches the soul on entirely different level, he's the Froyd before Froyd and if somebody loves layers, seeing people as unfinalizable self goes deeeep as it can get. His work is also on a different scale as he perfect polyphony in the literature work since he has so many characters with different ideas that are like living creatures and not just writers imagination.
In the top 5 I'd easily put Pekic who should've gotten biggest prizes for his work.
But it's a difficult question since there are far too many names I'd like to mention and all are kinda different in their own way.