komentator

1. (of a broadcast) commentator
   Sportski komentator je vikao od uzbuđenja posle gola. — The sports commentator was shouting with excitement after the goal.
2. (in the media) commentator; columnist; analyst
   On je politički komentator jednog dnevnog lista. — He is a political commentator for a daily newspaper.

For a woman, komentatorka is used.