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
What's an airport name when you can get a week of mourning declared when you die?
They set up his body on display in a way that's eerily reminiscent of Kim Jong Il did when he died.
He said he didn't want a personality cult (more likely he didn't want to be seen to be having one) but still set one up anyway.
The press (notoriously one of the least free in the world) lionized him frequently and enthusiastically and attributed the various successes to his keen intelligence and vision, etc. Meanwhile he bankrupted detractors with libel lawsuits with savage abandon in an attempt to quash any criticism.
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