Think about it: Look at the strides of awareness and treatment and tests that women have had with breast cancer, that the gay community has had with AIDS, because they're active and they talk about it.
The reality is that what you find out is that your head is the medicine. If your head is not in the right place and you don't think positively, all the medicine technology in the world is not going to work.
As much as I think John Coltrane belongs on the list, I think without Coleman Hawkins and Lester Young, both of whom defined improvising on the tenor sax, there would not have been the evolution of the craft by John Coltrane.