“his action at Lexington is remembered. It was Arnold - disobeying orders - who led the charge at Lexington”
Uh, I think you mean “Saratoga”, even if that was really Bemis Heights and Freeman’s Farm.
You're probably right ... I do get famous battles mixed up; so here's another possible major victory by Arnold. It was the battle of Valcour Bay where Arnold turned a British invasion fleet around; and ... given that, Arnold might have been remembered as the father of the American Navy.
Regarding my post 44, the Battle of Valcour Bay story is at http://en.wikipedia.org/wiki/Battle_of_Valcour_Island