Since this page has been without an image for a while, here’s a few suggestions for a new one: Starkiller Base (The Force Awakens): https://imgur.com/a/lVy0YzN Requiem (Halo): https://imgur.com/a/9KbkAc4 Magog World Ship (Andromeda): https://imgur.com/a/ChxxSMi
The Ark of Destruction from Space Battleship Yamato 2199
There's also Gatlantis from the orginal series.