Chakotay had dialogue that for me was as unmemorable as you could get. I've watched all of Voyager and I can remember exactly 1 line of dialogue.
To Tuvok after finding out Seska was a Cardassaian:
"You were working for her, Seska was working for them ... was anyone on that ship working for me?"
Aside from some of Tuvok's lines that was one of the funniest lines in the show.
It's funny; Chakotay was supposed to be a total badass, Maquis leader and all, and his first major development was having Tuvok betray him. And his second was having Seska betray him. And then, soon after, Janeway intentionally deceived him about Paris's "betrayal" also. And by that point, it seemed pretty clear that Chakotay was a total bleeding moron, to me...and the show never gave him a chance to kick enough ass to make back any of it. I really think that Chakotay simply never recovered from being messed with so many times in the first couple seasons; he never had a chance to really show his stuff.