Taking aside the Uchiha Clan, the Hyuga-clan is the strongest clan of the Leaf. They are known for their very powerful style of hand-to-hand combat and their bloodline limit of the Byakugan.The sharingan did evolve from the byakugan but they are two different powers. The byakugan does not possess the ability to mimic techniques. But in spite of that, it is still powerful. Like said before, the byakugan is the most powerful in terms of insight.

The chubby clan of the Leaf. They are most famous for their body enlargement jutsus and their large appetites as well as their own chubbiness. An easy way to look for them is to look for the large, chubby features of the clan member.

The Uchiha-clan is the most famous and most powerful clan of the Leaf. They have the rare and very famous Sharingan advanced bloodline ability. They are know throughout the world for their power.

At least, the Uchiha-clan would be the most powerful if it still existed. A terrible tragedy has overcome this clan. Uchiha Itachi, Sasuke's older brother, single handedly wiped out the entire clan. He left only one survivor: Sasuke.