That would be Steve Cowan's evil, nasty, vicious Queen Elizabeth. It can turn on a dime, hit you hard from any angle and is hard to kill. Plus it looks great too.
Iowas are the current "flavour of the month", but gee they are easy to hit, and if you can sucker them into a one-on-one they lose their speed advantage. Punch them in the nose a few times and their long narrow bow drops like a stone.
A while ago it was SoDaks.
Axis ships are well represented with Bismarck, Mogami, Littorio,and Yamato.
French dual quad BB's are popular too.
I still run my old Rodney, and do my best to protect my merchants from the horde.
We don't sail allied/vs/axis, but use a red fleet/blue fleet system, based on clubs. Look for the coloured ribbons tied to the mainmasts.