Someone on reddit analysed how many main cast lines are in the game. Wuk Lamat is 3rd

[Exmo]

I'd like to add that according to the Reddit post comments. The term 'lines' refer to every dialogue in-game. Including Main quests, side quests, seasonal quests, NPCs dialogues, etc.... and not just the MSQ dialogue only, which I believe makes this even more disastrous.

This seems to be the case. For example, Wuk Lamat accompanies us often in battle, so you get various segments like this:

Wuk Lamat: I've got you!
Wuk Lamat: Yaaaaaargh!
G'raha Tia: That was too close...
Wuk Lamat: Steady now.
Wuk Lamat: Dammit!
G'raha Tia: Spread out, everyone.
Wuk Lamat: You'll pay for that!
Wuk Lamat: Thank you.
The giant colibri flies into a fit of rage!
Wuk Lamat: What's gotten into this thing!?
G'raha Tia: Try aiming for its wings!
Wuk Lamat: Hmph, that was hardly a tickle!
Giant Colibri: Hardly a tickle!
Wuk Lamat: Try this!
Wuk Lamat: Nothing to it.

These are all counted as separate lines. Personally I think it's silly to consider a line like "Yaaaaaargh!" to have the same 'weight' as a line of exposition or drama, but this analysis collapses all context and meaning. For example, many of the lines in the above text are different lines by virtue of appearing in different text bubbles, but are clearly semantically and contextually grouped together. Given how inflated the statistics likely are, I'd be more interested in a report of 'meaningful' lines by character.