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Herakles seems like a stretch. Does accidentally being killed by your wife count as being "martyred"? She was trying to stop him from cheating on her at the time, so it's not as if he was trying to make a point. Even with the very loose definition of martyred broader society has, it seems reaching, much less on a page specifically about figures similar to the Christian described messiah.
Would Kane from Command & Conquer Tiberian Series count as this? I mean, I know he's more of a Dark Messiah and is technically the villain, but he DID save the Earth and is the head of the religious Brotherhood of Nod, not to mention he "died" several times and somehow got better!
Does Daniel Jackson from Stargate qualify? In the movie he was shunned by his peers and later he literally led a group of people to another planet then across a desert and back. Then there's the large number of "flase gods" he's helped smite and the guy has died/ascended and been resurrected so many times even devote Stargate fans have lost count.
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How well does it match the trope?