What about made Soviet passenger liner "Josif Stalin" class?
http://kruiznik.ru/forum/viewtopic.php?t=891 - ship foto and deck plans. 7646 grt. Was one from largest Soviet passenger liner.
And can You made Soviet passenger ship "Lenin" - first Soviet passenger ship was lost during war in 1941? Was sunk by Turkey submarine in Black sea. Link for foto ship:
http://kruiznik.ru/forum/viewtopic.php?f=13&t=1346
And Largest Soviet river passenger ship "Josif Stalin"? Link for foto:
https://bogdan-63.livejournal.com/6092860.html. And various soviet coastal vessels WWII:
https://www.rivreg.ru/assets/Uploads...chapter-23.pdf - if You wish made few coastal vessels.