hmmm honestly probally the hyuuga clan... there fighting style is soo good... imagine if u gave gentle fist to someone as fast as lee and they had the byakugan aswell xD it would just be soo OP xD
Uzumaki, I've always loved fuuinjutsu and barrier techniques in Naruto, mostly because they are under-utilized I feel and yet to me they have so much useful potential. It's the same reason some of my favorite characters use barriers and seals.
Even at the price of losing my sanity and becoming an emotional trainwreck, I'd pick Uchiha, simply for the fact that I could create non-extinguishable flames with a stare.
Gotta go with Senju, They seemed to have great strength and abilities, the uchihas.....idk man, the whole going blind thing is just something i'd like to avoid.