Favorite servant who wasn't much of a fighter in life but somehow ended up in a knight class (Saber, Archer, or Lancer)

Like the title says, a servant who's not really famous for combat but still managed to fit into a knight class container for another reason. Which is your fave?

For me, I gotta say I still like the idea behind Nikola Tesla being an Archer - his attempt at developing an effective means to transmit electricity without any kind of physical conduit. Plus he's very strong in lore due to being a major cornerstone in mankind/civilization's progress.