Akira Toriyama's writing reached its absolute peak during DBZ's Saiyan Saga.
The 1980s was a formative decade for anime feature films, the likes of which includes some especially cheesy cinematic stories.
The action is the story when it comes to Dragon Ball, and there's no better evidence of this than Goku's best fights.
Goku's used plenty of different Kamehamehas over the years, but these are the strongest.