Fox Mulder, because he didn't just die and come back from the dead once, he did it multiple times: "The Blessing Way," "Gethsemane" (okay, he faked his own death, but still), "Monday," and, well, the aptly titled "DeadAlive." It reminds me of something I read on Television Without Pity: "Do you remember that time Mulder died? Or that other time Mulder died? Or that other other time Mulder died?"