IIRC it's only:
Action Surge (short rest)
Second Wind (short rest)
Indomitable (long rest)
I also dislike non-at-will mundane abilities, but I'm trying to wrap my head around making them more acceptable without mechanical adjustments.
At least I'm going to think that
Action Surge is fatigue-based,
Second Wind is passive (got to do with your body's own resistance to wounds, not fatigue), and
Indomitable is largely random luck fueled by your adventuring experience. As such, they don't really "overlap", they can recharge separately.
The only real problem I have is with
Second Wind being a bit too much free healing.
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Then there is also the expertise dice of the Battlemaster. With that, it starts being difficult... it does seem also fatigue-based to me, especially since you can regain one die by "resting" (or catching your breath) for a single turn of battle - at least if this is still in the game, which is not 100% certain.
But... there is an alternative way to interpret
Action Surge: if you think of it as simply being
higher speed in combat, it's not even necessarily fatigue-based anymore. How faster is the Fighter compared to the others? Well... about 1 action per a few hours, the later 2 actions per a few hours...
