Some of mine include:
Polaris Class
Shepard Class (I love most iterations of this ship [except the Gagarin Class])
Nimitz Class
Korolev Class (in-game)
Fisher Class (in-game)
Lexington Class (by Lexx-Design on ArtStation)
Aphelion Class (by Lexx-Design on ArtStation)
Curiosity Class ([two nacelle variant] By John Eaves, modelled by ScFi Shipyards)