Mara or Corran, probably Mara. I give corran the edge in a sabers only fight with the others mainly kyle and saba due to his natural lack of offensive force powers. he's more used to fighting with the restriction and has spent his whole time as a jedi working around the handicap. Lobi doesnt have enough feats, and kyp doesn't have the saber feats to contend. Cilghals just outclassed, i think Luke even makes a comment about her being below kyp and kyle in sabers in one of the FotJ books.