Frozen_Heart
Hero
Thing is a gish wouldn't be 'eldritch knight but better'. Sure they would get 5th level spells and be able to enchant their melee attacks, but the advantages stop there.Swordmages/Gishes have that problem where the EK is a strong baseline for what their stuff would hypothetically do, so a lot of stuff out there tends to be "EK but better". Its an absolutely fine line to balance
(Also in doing some looking into I was reminded there was a good Pugilist class out there so non-magical fist fighter is another archetype)
Eldritch Knight would probably have higher hit die, and better armour. It would have 4 attacks, which can then be action surged up to 8 attacks. It would have more ASI increases in order to get its scores and feats in place faster. Those are the advantages an eldritch knight would have over an arcane gish class.