You can criticize LKY for many things, but a "cult of personality" is not one of them. Even after his death, and his will was very clear about this, there are precisely zero statues or portraits of the man, and neither are there any airports etc named after him. Hell, there's an ongoing legal dispute among his heirs about how serious he was about bulldozing the rather modest bungalow where he lived, instead of converting it into a museum. The only thing named after him is the Lee Kuan Yew Institute of Public Policy at the National University of Singapore.

All that said, I do agree that Goh Keng Swee (who?) doesn't get nearly enough credit for the economic policy that make Singapore possible: https://en.wikipedia.org/wiki/Goh_Keng_Swee