They are all so nice. All gave courage and support to their no good friends. All are great female characters.
I'd go with Hinata. She's exceptionally kind and sweet. Her speech after neji died about friendship and what neji meant was really touching. She's also very sweet to Hanabi. And has shown no animosity towards her paps who was a dk to her initially.
In the last, when she saw naruto get with another girl (as she assumed) She said she was happy for him. She's so selfless for rejecting the love of Naruto right after his confession to save her little sister.
All three are different from the boring aggressive bully serotype common in shounen