An interesting website that discusses this very topic!
http://combinedfleet.com/baddest.htm
Interesting link, though I have to say, I was surprised to see the Iowa class tied with the Bismarck for sea keeping. I understood the Bismarck was completely unsatisfactory out of the gates because she tended to bury her bow, and they had to do some work to her, but it never fixed it completely (can’t remember the source on that)
The Iowas OTOH, were reputed to have very good seakeeping ability, unless you were in typhoon.
I am not surprised the Yamato did better there, she was big enough. I spent time on a carrier, and the big ones still move, but you get the feeling they could ride out anything. LOL, wouldn’t want to try it, though.