Yea yea, Otto, Gunter, Dick and Mush were great but what about this dude?
http://en.wikipedia.org/wiki/Jimmy_Launders
Only sub commander (AFAIK

) that tracked and sank another sub,
while both were underwater.
Or what about this dude:
http://en.wikipedia.org/wiki/Nikolai_Lunin
a good commander in a very underperforming submarine force (the Soviet navy in WWII) whose personnel mostly served as infantry managed a difficult though probably unsuccessful attack on the Tirpitz and managed to sink 17 German vessels in the North.