As one of the local Kriegsmarine fans, I would just like to point out a few things about
Bismarck.
The hit on HMS
Hood on May 24th, 1941 was 100% pure luck. Being a battlecruiser of WWI design,
Hood posessed little in the way of deck armour. This left her extremely vulnerable to plunging fire, which killed around three battlecruisers at Jutland in exactly the same way - shell in the magazines.
As for putting
Bismarck down, most of the shells fired by
King George V and
Rodney smacked her superstructure, causing numerous fires and a lot of devastation. They made the mistake of closing the range, not allowing long range plunging fire to do the vital damage that was required to sink her. The end result was that they were pouring shells in horizontally into her, and
Bismarck, along with many BBs of the time, was very well protected against horizontal fire.
She was a very well protected warship, easily the superior of any one battleship in the Royal Navy. Our heavy units consisted of two classes of WWI era battleships (Queen Elizabeth and 'R' classes), along with early 1920s designs (
Rodney and
Nelson), some newer designs with smaller calibre guns (King George V class) and three WWI era battlecruisers (
Repulse,
Renown and
Hood). By comparison, the Kriegsmarine had fewer, but superior ships: faster, better armoured and in the case of the
Bismarck and
Tirpitz, easily capable of taking on any one of our BB/BCs and sink them. Okay, two of them would have been a problem, but then two against one always is.
Besides, if the
Bismarck was an 'inferior WWI design' then why the hell did the Royal Navy go mad over trying to sink her?

She was as fast as
Hood and as well armed and armoured as any comparable battleship of the time you care to name.

Leave the Iowa class out of that equation as they were post-1941 designs.
However, I present for your viewing pleasure the greatest pain in the arse that ever sailed the North Atlantic, the German battlecruiser
Scharnhorst:

With a speed of 32 knots and posessing 9 11" guns as well as enough armour to possibly class as a battleship, the
Scharnhorst was a real problem!