Iowa x Yamato has been done to death, but I haven't seen too many of the Yamato and the Mo.
Nagato and Missouri would be a good pairing, as the two met in Tokyo Bay for the Japanese surrender.
Washington, South Dakota, Hiei, and Kirishima at Guadalcanal would also be great. I love the chinese version of the USS Washington (zhan jian shao nyu).
And of course, there's the battle of Surigao Strait.