Choosing a German warship to preserve

Which German warship from either world war would be the most interesting to own if an incomplete ship were delivered complete?

Choices include Gneisenau with 15-inch guns and, under an allowance for captured ships, Clemenceau and Sovetskaya Ukraina. Graf Zeppelin is nominated sarcastically.

The question permits unfinished ships to be supplied complete and is then extended to captured hulls. Gneisenau with 15-inch guns is chosen partly for the joke that such a conspicuous battleship could be used to press Parliament for Royal Navy funding. Praise for Graf Zeppelin as flawless engineering is sarcastic. Clemenceau, the third Richelieu-class battleship, is proposed under the captured-ship allowance. Sovetskaya Ukraina, described as laid down at Nikolayev in 1938 and subsequently captured, is another attempt to use that allowance and test claims about an unfinished design's capabilities. Béarn is rejected as a captured German option because she was in Martinique and later became Free French. The discussion also names the projected French carriers Joffre and Painlevé.