Tales and Chronicles
Jewel of the North, formerly know as vincegetorix
This is why I do not hink there should be a class called "Fighter" in the book, because it leads to this sort of thing. There is no reason that martial characters automatically need to be simpler than magic using characters, but if you attach the name fighter to something people will expect it to be simple
You could flip this on its head, but only with discipline. A subclass system where the subclass isn't how the fighter fights, but why the fighter fights. Then the why would almost entirely give out-of-combat abilities.
Likewise, I disagree with the first premise of the design goals, so I do not regard this as a good class. But it does what it set out to do well.
I actually agree with you. Every classes ''fights''. D&D is a combat game with fancy bits. I'm okay with that; all classes are combatant with fancy ribbons. So, do we need a class that only fights and do not have said fancy ribbons for the sake of ''simplicity''? I personally dont think so.
My actual favorite take on the fighter, and beware its a hot one, is to have the fighter the specialist of enhancing himself with magic items. The fighter is mundane, no doubt about it. He needs magical stuff do deal with the magic of the setting and to stay relevant next to his spellcasters companions. A fighter without any magical macguffin will never be close to achieving the versatility and narrative control of spellcasters.
So I say: embrace the Christmas three, embrace the old-school narrative of the adventurer delving dungeons and facing monsters to find magical treasure to be equipped enough to take on another more difficult delve! Embrace the idea that the fighter is the ultimate master of equipment! BUT, dont let the magic item distribution in the hand of the DM: classes should be in the hands to their players.
So...a martial take on the artificer: a warrior that can get its hand on a bunch of magical gadgets to enhance himself. The ultimate Batman class, a mundane fighter boosted by its incredible equipment and wits.
By adventuring, this warrior finds or creates magic consumables, magic items, generates blessings and charms, acquires boons!
Arthur is a fighter with a magical sword.
Achilles is a fighter with a blessing
Robin Hood is ....well he's a rogue

I'll probably try my hand at it later tonight of tomorrow, stay tuned.

and thanks a lot for you comments, as always.