Chaosmancer
Legend
Thanks for the list.
Most of those seem like badass action hero warrior accomplishments, Not really mythic superhero levels like Marvel Thor though. These mostly seem like things that fighters in most editions of D&D can do.
Hit really hard.
Take heavy blows.
Cutting through one guy into his horse sounds like D&D cleave.
Cutting down lots of enemies seems like OD&D/AD&D fighters attacking one 1HD/less than 1 HD opponents per level per round. Running around in magical plate mail against 0 level men at arms you can fight a long time against a lot of them.
Hitting a dragon with a blow that "He could have knocked down walls with a blow like that" sounds like doing lots of damage. 3e D&D fighters can do that with enough damage, the hp of walls was defined.
The gold dust crushing is the most superheroic thing here that you probably do not expect a D&D fighter without magic strength to accomplish.
Do you know what the maximum damage for a club is in DnD 5e? 11 damage. That is a 20th level fighter with a non-magical club, non-crit. Crit gets you 17 damage. Now, maybe it was a 2-handed "greatclub". That is a max of... 13. 21 with the critical hit.
A wall of stone spell makes a section of stone, six inches thick, with 180 hit points. Even if we use 6 inch stone as our standard for a castle wall... That is never going to line up. Because you are right, it is defined... and defined to be impossible for the fighter to break it in a single blow.
But, your overall point is correct, this is all just being tough and being strong. We do need more, but this at least starts us to show that these people weren't just "men" they were super-men, they were greater than mere mortals. He chased a boar, without stopping, across nations. He just kept going. Where he does battle, nothing grows for years, from the death he unleashes. So it isn't bizarre to allow him to be more than just a man at the gym.