Sorry to bring an old thread up, but I want in too!
A few very good ones come off the top of my head...
Reggie Miller, John Stockton, Ray Allen, Jerry West to name a few, and the two others in my mind that were "arguably" the best overall shooters of all time were Pistol Pete and Larry Bird.
Those two had sensational shooting, and to make it even more spectacular was how they would score with some of their shots, absolutely ridiculous. To me, Reggie is arguably the best 3pter of all time, however for overall best shooter, Pistol Pete or The Bird takes it.