Probably not the absolute most touching, but, yeah, I think it's a pretty touching scene in context.

Spoilers for Brok the Investigator:

During chapter 2 there's a scene where Brok and Graff go up to a spot where Brok and Graffs mom used to go on dates, outside the dome. They have a father son bonding moment and at one point Graff asks:

Is it... wrong if I can't remember her? Not just her but... My father too.

It's an emotional moment where he wonders if not being able to remember his birth parents makes him a bad person and to me is a pretty emotional moment, with the music playing a just as equal role as making it emotional as the voice acting does.