Hey literary folk!

Dostoyevsky, Tolstoy, Gogol, Pushkin, Solzhenitsyn, Bulgakov, Chekhov, Goncharov, Shalamov, Sholokhov, Turgenev...

I have read stuff (or have stuff to read) by these guys, but which classic Russian authors am I missing from my collection? Must be a couple of obvious ones and a few lesser known gems I'm missing out on. Want to know who to look out for in charity shop hunts.

Cheerski.