Had to vote for slingin Sammy. Even I am not old enough to have seen him play, but he was the most dominant player the Skins have ever had. Didn't he lead the NFL in passing, interceptions (as a safety) and punting, all the same year?
Jurgensen may be been the most talented QB. He racked up unbelievable passing stats on some teams that had no defense, so they didn't get the championships.
Kilmer was a great leader, but did not play long enough to be included. Charlie Taylor was perhaps the greatest receiver, but I barely saw Mitchell play, and have a bias for Taylor. Mitchell was always dropping passes when I saw him late in his career.
Larry Brown was the best running back. He never had the lines, got all his yardage on talent at first, and then heart after his knees were shot. If I could pick any Redskin running back to have during his prime, it would be Brown.