i did a bit of research
from poysers role pm:
You win when Arthur Petrelli or Angela Petrelli, and all other factions, are dead (or if nothing can prevent the same).
So if we take what Guts said about a traitor/usurper at face value, and people said it (i think ace?) it would be arthur yes?
Meaning Angela would potentially be the other indy?
What about this:
Remembering Arthur's plans to murder Nathan, she used
the Haitian to dampen Arthur's abilities, and poisoned his food at dinner
From the heroes angela wiki (was looking for potential mentions of poison)