Well there are several
1. Hinata- The shy timid girl who could never really say anything without a pause or stutter was seen standing at the forefront against the Juubi and then delivered one of the greatest Talk no Jutsus in the Narutoverse as it was a counter Talk no Jutsu. She's now confident and courageous.
2. Sai- Had no emotions and then with the Kage Summit arc displayed signs of emotion, and finally in the war showed rage and sadness. Showed true friendship with Lee.
3. Choji- He wasn't at all a leader, but takes charge of the Coastline battle.
4. Sasuke- Almost didn't add him as he isn't part of the war yet, but he may be on the brink of returning from darkness.
5. Ino- Maybee with Inoichi's passing she'll be a little more reserved at times, but otherwise unchanged
I can't see Kakashi really having a personality change as he showed signs of returning to normal when Naruto gave him a little pep talk.