Definitely. Jackson was Lee’s true tactical master. His brilliance for shaping the battlefield to the strengths of the South undoubtedly were his strong point. Gettysburg would have been far different than it was had he been there.
Lee had indeed lost his right arm.
Two corrections to what I wrote: It was General Ewell, not “Euwell.” And it was Cemetery Hill that Ewell failed to take that first day, not Culp’s Hill.
http://en.wikipedia.org/wiki/Richard_S._Ewell