For an autopistol, it has to be the Colt 1903 Pocket Hammerless.
Revolverwise the Smith and Wesson M&P is very attractive with a 4 or preferably 5 inch barrel.
For rifles, take your pick of some of the pre-WWI Mausers. The M96 Swede, 1895 Chilean, 1909 Argentine or 1908 Brazilian. They are fine pieces of art with their long barrels, slender stocks (at least on the small rings), and excellent fit and finish.