This is an emotionally immature question.
They are all important to him to him,in different ways and they both taught him different,equally valuable things.
Iruka was the first to acknowledge and befriend him,when everyone else shunned him,the first to see the good in Naruto.He saved Naruto from going down the path Gaara initially went.
Kakashi was his team leader and taught him the value of friendship and teamwork.
Jiraiya was like a father to Naruto and trained him,helping him evolve into a great Shinobi.
All are contributions,without a single one,he would not be who he is today.
Things like this cannot be quantified.Their values cannot be compared on a quantitative basis.