Books/Authors like Osamu Dazai??

trying to get more into japanese literature, but i feel like i only know the popular ones like akutagawa, kazuo ishiguro, sayaka murata, chuuya, etc. Anybody got any not-so-popular or mainstream authors to recommend me? Preferably classic, and of similiar themes to Dazai and Dostoevsky. pretty plssss !!