1. From the original FFXIV, when Gaius Van Baelsar fought the Scions: https://www.youtube.com/watch?v=1h8TKeXk5eA

2. MSQ from 2.0, the cutscene where Ultima Weapon took on three primals at once: https://www.youtube.com/watch?v=F9ECyz3Kgx4

3. Heavensward when Haurchefaunt died, not because he died but because of how emotional the sequence was for a lot of people, it's really hard to get that kind of reaction in an MMORPG.