Bulma has maintained importance through her tenacity and determination. Despite being physically weak, Bulma remains relevant ...
Dragon Ball Z's Wrath of the Dragon is an excellent movie that could have functioned as a much stronger anime series finale.
Gohan could've been the Dragon Ball protagonist after Super Saiyan 2 ... by seeing him become a regular high school student in the Boo saga (although the Great Saiyaman deserves a bit more love).