What is the best martial art/self-defense?

I hear Brazilian Jiu Jitsu and Krav Maga are superior.

Sigh. Each poster lacks basic understanding of martial arts. Jeet Kune Do worked for Bruce Lee, it was his own personal style. Jeet Kune Do is more of a mental thing than a physical moveset, though it has suggestions for that too. There is no 'best fighting style'. Each style that exists was created by someone else for their own thoughts and body. In other words: they made it for them. Anything you learn you must alter in order to suit you. Design your own style, or in the end you are destined to lose. That is why Bruce Lee was so successful, he engineered his own style. My suggestion for doing this is to remember the basic structures of combat, grappling, ground fighting, punching, kicking, dodging, countering, deflecting, multiple enemies. I would suggest cannibalizing things from Krav Maga, Brazillian Jujitsu, read the Tao of Jeet Kune Do, Personally I like Taijutsu, though that's me. Just cannibalize other arts and make your own suited to yourself. Otherwise...