At the end of the day he found, accepted, pursued and promoted the "gospel of grace" and exposed its opposite namely legalism (and moralism) as apostasy.
This is something anyone can do, and many exJWs have.
How many?
Possibly millions.
The difference?
In the end not too much really.
He was human and likely went through many of the same process and phases millions of exJWs do: questions, research, doubt, uncertainty, shock, fear, horror, loss of identity, consolidation, peace and so on.
True, Ray rose much higher and had more to lose than most of us by way of credibility, status, authority and power.
He was also very good at explaining, and writing, at length and in great detail.