Plot wise, Id say Sakura.
I mean she's the heroine. Brute strenght really kills. Raw Power is what makes her the strongest. Plus medical prowess, I say.
Combat Wise, Id say Hinata.
Damn she's a Hyuuga for crying out loud. She has a complete range of attacks. She's a versatile fighter, and has a formidable jutsu style. A very few could survive a lethal chakra disruption. She just needs a push.
Tactic Wise, Id say Tenten.
Well, it really depends on the weapons she'll use, how she uses them, and how much chakra it will cost her. It's all in the proper utilisation and timing of her attacks.
Else, Ino.
The focal (or only) formidable power of Ino is her mind techs. She is really best as a support unit. Her jutsu is handy in espionage and scouting, but for combat, I don think so. If she can control the mind of her foe, as in a total telepath, then she's solo queen.
Overall ranking: Let's say they are in equal footing, in the same amount of development. It all comes down to their skill set.
1. Hinata - a Master Jyuuken Combatant with complete ranged attacks.
2. Sakura - Brute Strength + Medical Ninjutsu used Offensively
3. Tenten - Spammer of Weapons + AOE + Long Range + explosions + terrain advantage
4. Ino - awesome new mind techs that enables her to fight solo. Maybe some kind of force field or sense deprivation or illusions. idontknow. She's good anyway the way she is now.