Most Underused Jobs in the Final Fantasy Series

Reacting to a GameRant article that writes about the most underused jobs in the Final Fantasy game series. Let's see what they wrote. Feel free to use the time stamps below to easily navigate the video.
Time Stamps
0:00 - Introduction
2:19 - Dark Knight
4:31 - Geomancer
6:22 - Chemist
7:30 - Ranger/Beastmaster
8:38 - Scholar
10:19 - Necromancer
11:43 - Gun Mage