Parece bastante claro que era Tyler . É possível que alguns desses capítulos fossem auto-iniciados, mas Tyler frequentemente mantinha o Narrador no escuro, mesmo mentindo para ele sempre que ele quisesse ... mas o script tem o Narrador (chamado" Jack "no script) dizer ...
Every city I went to...
...as soon as I set foot off the plane..
...I knew fight club was close.
Tyler was setting up franchises, all over the country.
Wikipedia parece confirmar ..
Seeking Tyler, he begins to discover that Tyler has established a secretive underground network of fight clubs nationwide operating under the ethos of Project Mayhem.
A negação a que você se refere ..
JACK Local 8 just started in Penns Grove. And, Bob said he was at fight club in Newcastle last week. TYLER Newcastle? Did you start that one? JACK I thought you did.
... é, talvez, a primeira indicação, em retrospectiva, que Tyler é o Narrador.