I disagree. Heaven was a well-established concept in Tanakh. For example, Hanokh was taken by Yehovah after 365 years. Also, David states about his son, "I shall go to him, but he will not return to me." Furthermore, Shlomo writes down, "Who knoweth the spirit of man whether it goeth upward, and the spirit of the beast whether it goeth downward to the earth?" As far as She'ol and per Dani'el 12:2 ("And many of them that sleep in the dust of the earth shall awake, some to everlasting life, and some to reproaches and everlasting abhorrence."), would there be tzedek if people like Amalek and Haman weren't eternally condemned to She'ol? Also, what of Korach? "And it came to pass, as he made an end of speaking all these words, that the ground did cleave asunder that was under them. 32 And the earth opened her mouth and swallowed them up, and their households, and all the men that appertained unto Korah, and all their goods. 33 So they, and all that appertained to them, went down alive into the pit; and the earth closed upon them, and they perished from among the assembly."
Yavan may have been influenced by his patriarchs Yafet and Noach, but I don't think that Yavan had any influence on Yisra'el's beliefs.