Navi meets Bon Jovi. That's what I thought upon reading your title.
I do see your "living dead" interpretation for (2) and (4); however, that was not the first interpretation of those sentences which came to my mind. Indeed, I think all four sentences are "correct and make sense in a world in which there are no living dead."
There are differences, though. I read (1) as saying that the list included thirty revolutionaries, regardless of whether they were living or dead; (2) as saying that the some living and some dead were included; (3) as implying that whether they were living or dead is not known to the speaker; and (4) as ambiguous.
In (4), we could have thirty "living dead," or thirty living and thirty dead.