raffles never found SG,it already existed as temasek a 1000 years before ..raffles was tasked to find another choking point in the Malayan archiepelago as a competition to the Dutch who had the entire Indonesia including the spice islands in their control
the supervision came from Penang, whose governor was not too pleased with establishing another place ..it was not only Raffles but Farquhar was also was with him during the search ..Farquhar choice was the Karimun Island but Raffles chose Singapore instead