It isn't irrelevant, given that you're talking about someone that we've established literally in the last page has had a bunch of Noble Phantasms and other assorted powers attributed to him, when he personally came up with very few of them.
It's an established thing that Servants can be divided up into a bunch of groups that range between "literally never existed, is a storybook hero" and "an actual dude from history, but he now has a magic ship or something".
FGO Supports
Yeah, that was what I was talking about. Not in the VN IIRC, but a blog post or interview or somesuch.
FGO Supports
It's from CM3, but that's always been a hazy point on what exactly that means and more recent talk on how it interfaces with stuff like, say, the dialogue in Holmes' trial quest.
It's also been inherently contradictory. Heroes need catalysts for summoning. Herc was considered someone who didn't exist, but he was summoned by a nameless object he used. If he didn't exist, then his axe-sword wouldn't exist as a physical object independent from himself The only way to rectify this is if there's a myth variation of the world that directly interacts with the real one, or the myths are made real by beliefs. Welcome to lore hiccups.
The axe-sword was just carved from a pillar to a temple of Herc though. It wasn't something he ever used in life. So your argument kind of fails, because summoning catalysts don't have to be anything the hero ever used in reality, just something people associate with them (like, say, a pillar from a temple dedicated to them).
Heracles participated in the Gigantomachia proper so he definitely existed.
I always took the line from Gilgamesh's bio in the original VN that he was "not merely a legend, but said to have actually existed" to be an indirect way of saying that most of the other Servants didn't actually exist in real life.
But I guess it's kind of hard to argue that in the current state of the Nasuverse, isn't it?
My Fanfiction - Almost entirely short stories and oneshots
Could have sworn there was something saying he used it. Oh well. Then I'd pivot that time-traveling would, at this point, indicate that, since things like the Greek Gods exist, and they acknowledge the Greek Heroes, they exist at that point, regardless of what came first, the myth, or the heroes themselves.
Bottom of the barrel would be Nuada, Breoghan and every other British soul that hasn't appeared. Also, Sca is Scottish, so you want Aife added to the list.
What the...
HE'S COMING HOME BITCHES!
Everyone knows me well enough to deduce who is.
petition to reclassify all 'British' servants as 'French' - just like Britain itself
かん汗ぎゅう牛じゅう充とう棟
Expresses the exceeding size of one's library.
Books are extremely many, loaded on an oxcart the ox will sweat.
At home piled to the ridgepole of the house, from this meaning.
Read out as 「Ushi ni ase shi, munagi ni mitsu.」
Source: 柳宗元「其為書,處則充棟宇,出則汗牛馬。」— Tang Dynasty
But El Cid was a jobber
El Cid and Hannibal weren't even jobbers. They were just random murder victims. Jobbers get a chance to fight.