
What are the most wasted characters in Dragon Ball?
I'll start with Goten and Trunks.
Despite being portrayed as incredibly promising, they've become almost irrelevant outside of fusion. Even in their own arc, they were overshadowed by Gohan, as well as the return of Goku and Vegeta. Since Dragon Ball Super, they haven't had any major accomplishments or meaningful development, despite originally being presented as the next generation of warriors.
They had all the potential in the world, but Dragon Ball Super and GT never really did anything with it.