Capital Ships
Battleship Condescension (Homestuck) Link
The Eclipse-Class Star Destroyer (SW Legends Verse) Link
Super Galaxy Dai-Gurren (Gurren Lagann) Link
Mid-Size Ships
Pretty much any PC ship from Starbound but the Floran one is cool imo because its jury-rigged, the Glitch get a flying castle, and Novakid fly the Hype Train Link
Starlord's ship from Guardians of the Galaxy
Most of my favorites have been stated here already, but the SW literature has some great ones. Also, I'd count spaceworthy Mecha here.
