Kid Eternity. Mr. Justice, the Gay Ghost, the Ghost Patrol.
As it happens, I
suddenly remembered what I knew about Kid Eternity's origin story ("Hey! You aren't supposed to die for decades yet! This messes up our sacred schedule! Drastic measures are required!") a few minutes
after I'd written and posted the original query. (In my defense, I might mention that I don't think I've ever read the actual debut story of Kid Eternity. Just references in later comics and in online summaries of the character concept.)
I knew, vaguely, that there was an Archie/MLJ superhero called "Mr. Justice." I didn't know his origin story involved his own death. Likewise, I think I'd heard the
names of the Gay Ghost and the Ghost Patrol before, but without knowing anything else about them -- such as whether or not they were literally ghosts. I suspect I had previously assumed "Ghost Patrol" was just a
colorful nickname for a conventional military unit that had its own little feature in the back pages of a title during WWII. A little online research, however, confirms that there were some honest-to-goodness
ghosts involved in all three of these cases!
Then there were those who came close to death like Blackhawk. After his family are killed, the unknown man leaves behind his past and becomes simply the man known as Blackhawk.
I don't think that one fits with what I'm going for here. Lots of comic book heroes had "the sudden death of one or more loved ones" in their backstories. (Batman and Superman spring to mind in that context.)
Eel O'Brien survived a near fatal accident similar to that of Denny Colt.
On the other hand -- near as I can recall, no doctor examined the body and pronounced Eel to be dead. Nor was a funeral held. So for my money, he didn't come nearly as close to "crossing the line between life and death" as did Denny Colt. If Eel had been declared legally dead and his will had gone through probate, even though his body had not been found at the scene of the crime, then I'd probably reconsider. But as far as I know, that never happened either.
There were several mystery men who suffered some accident that ought to have killed them, but instead gave them extraordinary powers. The Ray survived a lightning storm that left him with the ability to travel on light beams.
Same basic reasoning as for Eel O'Brien -- "I could have died, but it
didn't happen and the authorities
never thought it had happened!" doesn't quite fit what I had in mind.
I admit that since my original query was very much a
spur-of-the-moment thing without any sort of detailed Master Plan behind it, I'm now having to "make my own rules" as I go along, regarding what does or doesn't seem to fit my vague idea of what I was seeking, and where I should draw the line in doubtful cases! I certainly can't blame you (or anybody else) for being unable to "read my mind" regarding whether or not I will "like" a particular suggestion, and I appreciate all efforts to provide me with helpful suggestions.
As an example of how something can catch me completely by surprise:
Someone on another forum made a very interesting suggestion last night. (I'd posted the same query in various places on the Web.) He pointed out that the Golden Age
Hawkman and
Hawkgirl had the premise of "we were lovers in Ancient Egypt who were
murdered and have now been
reincarnated as modern Americans" as part of their origin stories from the very first appearance!
I had
not even considered "reincarnation" as a form of "coming back from the dead" when I posed the original query. But since both of those characters ended up with strong memories of their past lives (and being murdered), and since the guy who had murdered them was the same villain (also reincarnated) whom Hawkman fought in his debut appearance in the "modern world" of the early 1940s, I am inclined to agree that "violent death" and "making a comeback to try again" were vital elements of the original character concepts.
On the other hand! If, say,
someone else had simply told Carter Hall, "Oh, by the way, you are the reincarnation of an Egyptian Prince," and if he had just shrugged skeptically and said, "Sure, sure, whatever," then I would feel that his alleged status as a "reincarnation of a guy who got murdered" was
not a very important aspect of his origin story, since Carter himself didn't remember a past life as Prince Khufu, didn't hold a grudge over how Khufu had died, and didn't take the reincarnation idea very seriously. I mention this as an example of where I would "draw the line."
P.S. Come to think of it! I believe a Golden Age Timely hero called "The American Avenger" had something
similar to that scenario happening in his own origin story -- it was
suggested to him that he might be the reincarnation of a 19th Century Argentinean hero called El Gaucho, but Don Caldwell
didn't claim to remember anything about a "past life here in Argentina," as I understand it, and so that was
not the main reason he started dressing up in a colorful costume. (I think.)