Sakura only had one major fight for 670+ chapters so again she and Hinata are pretty even in terms of relevance.
No no no. You are only looking at the number of important battles as opposed to the important "things" that they actually did. As I recall, Hinata has never had an important battle. Sakura's accomplishments and feats far proceed anything that Hinata has done.
>She learned medical ninjutsu from Tsunade
>She learned super human strength from Tsunade
>She fought along side Chiyo in the Kazekage arc against Sasori
>She actually healed Naruto's arm when he used FRS for the first time
>She figured out the secret of Zetsu's ploy who was pretending to be a fake neji
>She healed counteless people in the SA
>She also tried to pump Naruto's heart from giving out after the Bijuu extraction
What has Hinata done?
No seriously, what has she done that even comes close to Sakura? I wan't to know Eagle?