Subclass
Hey Baz, I know it says you are working towards Eldritch Knight on your PC sheet, but that is not set in stone. Given the amount of spellcasters in the group you might not wish to go down that path, and if you do, it seems you are more divinely inspired, so levels in paladin might be better.
However, if you just want to go a simple fighter, obviously you have the Champion in PHB, or more complicated Battle Master. However, if you want to play a dour, heavily-armored, dwarven defender archetype, I suggest you have a look at the warmain I wrote up :)
For a list of archetypes, here is what I have collected: Fighter page.
Cheers.
“It is amazing what you can accomplish if you do not care who gets the credit.” – Harry S. Truman