I think it pre-dates him to be honest. But who knows who told a particular joke first?
That old one - When I die I'd like to go peacefully in my sleep...not screaming in terror like my dad's passengers. I heard it attributed to Tommy Cooper but I saw the other day it was listed as one from Bob Monkhouse.

That's a name I haven't heard in a while. I remember his 'Chalky' sketches.....I wonder if he is still on the road doing stand up?

From Daily Mail last week.
Jim Davidson launches Twitter rant after 'the smallest crowd' attends show | Daily Mail Online
I think the PC brigade scuppered most of the comedians like him.

I suspect George Carlin used it before JC turned to comedy but even he may not have been first.

They should listen to some Roy Chubby Brown, that would get them really triggered!