Zardnaar
Legend
Githyanki (MToF) get +2 Strength/+1 Int. Which as the original gish, and coming with weapon and armour proficiencies isn't actually bad. Wizard in medium armor and 2H sword Booming Blading everyone = win.
I generally rate tieflings and gnomes as the weakest PHB races. But MToF has some stronger options for Tieflings (cha/dex, cha/str), as does the SCAG variant (int/dex).
Good find I forgot about the gith. The one archetype it leans towards the racial stuff is useless.
Leaves your example of a fighting wizard.