Harlock
I should have expected that really
The English Electric Lightning from the pioneering days of supersonic aircraft. It was made as a point defence fighter to intercept Soviet bombers and optimised to a ridiculous degree for that role. In terms of speed and acceleration it was unmatched until the F-15 and even then could still get off the ground faster
It was specialised to the point where it couldn't be significantly upgraded or used easily in other roles. Very short ranged with increasingly ancient weapons and radar, but still had ridiculous performance with one or two highly tuned fighters having the ability to outrun Concorde and reach almost 90k feet.
Not the most practical aircraft but for its day very impressive and unique