Gammadoodler
Hero
Apologies for the double post. But also this is backwards thinking.nothing he does is outside the range of what I would expect a D&D Fighter to be able to do (if you ignore the setting / technology).
The same is not true for Ironman, Hulk, …
It's less a matter of "Do John McLain's actions fall within an acceptable range of a D&D fighter:
It's more a matter of "Do a D&D fighters' exploits at all levels reliably map to John McLain's level of capability"
To me, the answer is a definitive "No".