One I can think of that killed off Hitler in a particularly grisly way is Byrne's 4-issue
OMAC series in 1991. That was a great series right up till the last 6 pages of issue 4, when it went completely off the deep end and completely lost its way. I've re-read it several times and still can't put together what actually happened.
But it did present a particularly graphic BBQ Adolf Hitler.