The only fighter dialogues I remember in act 1 is.
- Can instruct the tiefling who wants to learn fighting without a check
- Can intimidate the goblins at the windmill into leaving without a check.
Both of these Barbarian can do as well, same result.
It’s such a shame that one of the most common classes (human fighter combo) is basically as bland as the TAV, also known as default origin.
On the other hand, it's hard to actually write for a class that can be played in any way, shape or form and one that lacks any kind of defining feature.
The only exception would be subclassess, most notably battlemaster and Eldritch Knight