i'll go with the guy who won the nfl mvp that year.
LT was the star of the defense but he really wasn't the leader or captain of the defense. That would be Carson. Simms was def the leader of the offense.
But like was said above, it was Parcells team..
Without a doubt it was Phil Simms's team. LT was GREAT, but Phil Simms was the true all out leader of the team. The Defense of the 86 Giants was one of the best defense's the Giants ever had. Pepper Johnson - Carl Banks Leonard Marshall wer all GREAT PLAYERS. The Offense besides Bavaro and Morris were to put it bluntly wasn't stellar, especially the Wide Outs at that time. Phil elevated that offense and made the Wide Outs look good.
when you watch Simms in the superbowl you see who's team it is. That said LT was a major piece on Defense.