No. IT and Fox would not work together. They are too similar for it to work well. Both are Ball Dominant PGs. IT shoots better off ball, but IT also has better handles and penetrates quicker and more effectively than Fox. If we draft Fox, we're trading IT or letting him walk.
I think IT + Ball could work, but I think IT + FULTZ is a dream combination. We need Fultz. Or Jackson, Or Isaac, or Tatum.