First up from my Neglected Starships Poll is the Enterprise
NCC-1701-C commanded by Captain Rachel Garrett in the exceptional Star Trek: The Next Generation episode 'Yesterday's Enterprise'.
and it's crew gave their lives in heroic self-sacrifice to save a Klingon outpost Narendra III, that was under attack from four Romulan Warbirds...out gunned and out numbered...the Enterprise
and her crew valiantly battle the odds (and a pesky temporal anomaly
), earning the Klingon's respect in their honourable deed, which in turn leads to a lasting peace between the Empire and the Federation.
Starfield Stock by aRchAng3lZz.
Enterprise-C from [link]
converted by me.
I am posting these in the order of my Neglected Starships Poll, this Poll is ongoing so continue to vote, as voting may change the order and keep me on my toes.