Specifically, the D'deridex class.



Have a look.






It's not the prettiest ship. But I am not arguing that it is the prettiest ship. It is, rather the fullest extension of design principles which were explicit in classic Trek from TOS through most of the TNG era. These principles followed fictional rules about how starships work. These rules are that warp engines come in pairs, and that they must have line of sight with other (i.e., if you were standing on the right engine, you must be able to turn to your left and see the right engine, and vice-versa). The reasoning here is that the warp-field is generated by the engines and that a charge like that of a spark plug fills the space between the engines.





The D'deridex Class is the perfection of this design strategy, because it stretches the whole ship around these rules, quite literally. The BIG whole in the middle of the ship is the space required for a warp field, but it takes advantage of available space both above and below the nacelle AND both forward and real of the nacelle. This is the one ship that really fully builds around the (back then) canonical requirements of a starship. Every other design "wastes more space" in this sense.