Dostoevsky died before the nobel was created and he was not a posthumous candidate.He was never a candidate for a nobel..also 'cause it was first given out in 1901.
Mahatma Gandhi was nominated for the Nobel Peace Prize five (5) times between 1937 and 1948; his nomination in 1948 would likely have resulted in his receiving it, were it not for his assassination.
5 (five): Physics, Chemistry, Medicine, Peace, and Literature. The Economics Prize is not an 'official' Nobel prize, only an added-on memorial prize established later.
Mahatma Gandhi was nominated for the Nobel Peace Prize from 1937 to 1948. However, when the organization decided to award him the prize in 1948, he was assasinated.