Probably High-Elf Eldritch Knight armed with a Greatsword or Glaive.

Sub-optimal unfortunately, but EK just seems to be made for High Elf Fighters flavor-wise. Maybe Larian will provide something that will make it work. Like making that Headband +2 Int instead of a fixed 18 so you can't just dump important base stats. Or putting the appropriate restrictions on Scroll use so that could be an EK thing.