As we look at the visit of the Magi in Matthew 2, the obvious lead human characters in the story are Herod, the Magi, and Jesus himself. These are the lead protagonists and antagonists.
Whilst the Jewish priests are more flat, functionary characters, we mustn't miss the contrast Matthew deliberately paints between them and the Magi.
Michael Green comments:
“They know their Scriptures and had no problem in answering Herod when he wanted to know where the child would be born. Back came the answer, pointing Herod to Micah 5:2. He would be born in Bethlehem, of course. But did they go to greet him? Did they lift a sandal? Not at all. They knew it all, but they did nothing.” (page 67, in the original edition)