After more experience in 2024, If you are looking at a single classed fighter Sword and Board, I think the best is an Eldritch Knight with Warcaster and Hex through Fey Touched.
I think this because with sword and board you want to really cash in on your high AC, so Warcaster with Shield spell gives you a very high AC. At 9th level you can use Sap with any weapon making this even better. Getting Hex and combining it with the Eldritch Knight 7th level feature means you will stay ahead of a basic PAM sword and board. Using two feats on Int/Wisdom/Cha can be tough, but you get the extra feat so it is workable.
If you are not going to play an EK, then I would look at getting Defensive Dualist, which is going to tie you to a finesse weapon, and probably piercer to go with it.