1-Among Russian writers, Faulkner was most influenced by the works of Dostoyevsky.
2-Among Russian writers, Faulkner was most influenced by Dostoyevsky.
3-Among Russian writers, Dosteyevsky influenced Faulkner most.
Sentences one and two are awkward at best, since "Among Russian writers" seems to be referring to Faulkner. In fact, I was thinking (briefly) that Faulkner was a Russian writer who had been influenced by Dostoyevsky. Then I remembered, of course, that Faulkner was American.