I went for the Buffalo - the Finns in particular acheived great things with it against an enemy with massive numerical superiority.
Just an aside about the Bismarck - another reason it took the RN so long to sink her was because their gunnery was appalling. Even at point blank range some British BBs were struggling to hit the German ship. Another piece of Bismarck trivia; the first Stringbag strike launched against her was a farce that almost degenerated into tragedy, as the Stringbags mistook the 10,000 ton light cruiser HMS Sheffield for the German battleship and attacked her. The cruiser was saved by a combination of skillful handling and faulty torpedos. Fortunately, Sheffields gunners did not open fire on the Stringbags...