Is there any sort of shipbucket scale that is the FD but with more pixels-per-foot?
Lol, a scale that's something, alas completely different?
In a FD scale ship of the size of Bismarck would already be ca. 5500 pixels long, and projectiles of it's main artillery would be ca. 9 pixels in diameter (calibre). I don't know what "more" You want. (leaving aside who would draw it)
That said, in theory (besides the Gunbucket scale), there's also a little-used Carbucket scale (20 pixels per foot):
But even ALVAMA wasn't mad enough to draw full-sized warships in this scale.