If you can't see how paul can fit into the description of the prophet then we will have to look at what Jesus said he would send.
John 13:20 Verily, verily, I say unto you, He that receiveth whomsoever I send receiveth me; and he that receiveth me receiveth him that sent me.
John 14:26 But the Comforter, which is the Holy Ghost, whom the Father will send in my name, he shall teach you all things, and bring all things to your remembrance, whatsoever I have said unto you.
John 15:26 But when the Comforter is come, whom I will send unto you from the Father, even the Spirit of truth, which proceedeth from the Father, he shall testify of me:
John 16:7-14
7. Nevertheless I tell you the truth; It is expedient for you that I go away: for if I go not away, the Comforter will not come unto you; but if I depart, I will send him unto you.
8. And when he is come, he will reprove the world of sin, and of righteousness, and of judgment:
9. Of sin, because they believe not on me;
10. Of righteousness, because I go to my Father, and ye see me no more;
11. Of judgment, because the prince of this world is judged.
12. I have yet many things to say unto you, but ye cannot bear them now.
13. Howbeit when he, the Spirit of truth, is come, he will guide you into all truth: for he shall not speak of himself; but whatsoever he shall hear, that shall he speak: and he will shew you things to come.
14. He shall glorify me: for he shall receive of mine, and shall shew it unto you.
hmm all the same he,Comforter,him,himself,Spirit of truth,Holy Ghost here.