Who Really "Founded" Singapore?

I think that it would be neither of them because Sang Nila Utama only found the island, name it Singapura and left the island. Before Sang Nila Utama found Singapore, Singapore was already a port city, naming Temasek. Stamford Raffles founded it but there was already a sultanate, meaning someone had already founded Singapore. John Crawfurd only signed the treaty, he did not found the island and as for William Farquhar, he only established Singapore to a successful country. Since then, Raffles founded the island later than Sang Nila Utama and someone before Sang Nila Utama founded it and had already established it to a port city and as John Crawfurd and William Farquhar did not found the island, I conclude that Singapore is founded by someone else. Someone who is not in what we study, someone who we will never know. Thus, neither Sang Nila Utama, Stamford Raffles, John Crawfurd nor Willliam Farquhar is the founder of Singapore.