I looked it up and with the loss of Mays there are now 2 former Negro League players still alive:
https://www.baseball-reference.com/p...reasbi01.shtml
https://www.baseball-reference.com/p...easlro01.shtml
Neither guy actually played much in the NeL (although Greason also got a cup of coffee with the Cardinals, I guess shortly after they integrated their team for the first time in 1954) so in a sense Mays is the last of his kind in one other way...