Wasn't the fourth the one that sealed Kyubi into Naruto's baby-self? If i am correct that would make the fourth Naruto's...creator/god..? Also, the fourth (correct me if i am wrong...it HAS been a long time since i've seen the real story) was the only one who was able to deal with Kyubi making him the one best able to help Naruto (who has the Kyubi).