>>"the best style is fighting without the fighting."<<
Absolutely... but that takes training and a lot of practice too. Very, very few martial arts schools offer competent training in these techniques.
I also agree with Aikido or Tai chi, however, they are not as effective against some relentless crazed individual IMO unless you are extremely well trained and this takes years and years - ask any law enforcement officer that has emptied his\her clip into someone who is whacked out, and still ends up getting injured or worse - I know of one police officer that was killed by his attacker *AFTER* emptying his service revolver into the man... this can occur, whether they are on drugs or not... unless you immobilize them in some way.