What's Wild Arms 2 and 3?
When Squall got icicle'd, I seriously thought he was dead. I mean, the icicle when right through him!
Also, I thought of something rather interesting. Maybe Zack is sort of a deconstruction of those ridiculous invincible heroes, because all Zack's Jenova cell/MAKO enhancement only made his death that much longer and drawn out. He must have been in so much pain...
Cloud, too, may also be a deconstruction of invincible heroes, especially in Advent Children Complete, since while he may have survived getting impaled multiple times by Sephiroth, all of that nearly killed him, and quite painfully so.