Is becoming a good person more important than performing salaah?

I have some doubts in my mind. Mostly people say offering prayers is the first thing every Muslim should do even if he is committing any sin. I have a question does Quraan really say that offering prayers is the first priority and becoming a good peson who does good deeds is secondary thing because in todays world we see many people who offer prayers but commit sin and on the contrary there are people who are good human but dont pray. So I really want to know what Allah says about this is becoming a good person more important or offering prayer. Although I know that mostly people say that through prayers one can only become a good person but what about those who perform good deeds but dont offer prayers that too often