Sakura.
Prove it.Every character has relevance, that's why they're there to begin with.
10 10 is one of them
Hinata gave birth to teh protagonist of Boruto Manga...Minato, Hinata, Himiwiriwiari
The only characters with absolutely no relevance to the plot are the nameless background village residents.
Some characters lose relevance over time like Suckura and Shitruka, but at one point every one of them had a part to play in the story. It's basically impossible or very difficult to create a character who has no purpose in one way or another, no good Mangaka wants to waste time drawing filler.
You must be registered for see images
Itachi, he literally had no effect on anything towards to plot which was peace.
That fool killed his entire clan, went to join the bad guys, never attempted to fight them, had AIDS, etc.
Fugaku, Sakura, Sarada
Sakura.
You're right. Naruto's death wouldn't have had an impact on the rest of the remaining plot.