MP: I don't know I'm just repeating what was in this very old dictionary/encyclopedia set that I have. They claim that according to EX 2:1 Moses was also in line for the priesthood since he was a LEVITE. But he was given a 'commission' by God directly. As far as prophesying, I don't remember any right off hand myself. I don't remember any prophesying that Abraham did either, but it mentions because he was commissioned by God to go live in tents and leave the city, etc.
Him & Elijah are known in Judaism as both Priests & prophets. [Elijah even took on the role as a Priest offering sacrifice-1 Kings 18:32].