100% agreed as I can't think of any one individual since(1) who has done as much for all of science and engineering as he ultimately did; alas, they are not awarded posthumously.
(1) Newton would be a strong contender on a "for all time" basis, but even he would've probably needed to share it with Leibniz, which would have driven him absolutely ~b o n k e r s~, like wet hornet in a hot outhouse mad, LOL.
Given the line of reasoning this has now opened up Alan Turing should be awarded one posthumously in every field.