Put me down for another Uriel and Kvasir/Atalanta.
Six Rapiers, two Gattlers, Archer, Vulcan turret(far exceeding the competence of any GT(V)A bomber turret), and a dozen Slammers, in the body of a stretched-out Zeus with attitude.
The Atalanta/Kvasir, OTOH, is a bit more balanced, with a nice centerline missile bank(Tempests) to combine with the quad gun bank, and speed and maneuverability to help press that advantage up close, plus a pair of nose-tip guns for precision turret sniping/bomb intercept. Style-wise...well,
just look at it.
EDIT(now having played with the Gefjon):
I'm in the early stages of writing a short campaign for which I had been planning on the player flying only the Gefjon, but trying to dogfight in one is a miserable enough experience that I'm really considering centering the campaign around the Stheno and modifying mission concepts as necessary. Sure, it maneuvers like a capship, but when you do line up a perfect shot on something, it will hit.
So, my answer is the Stheno.
Seriously, if you haven't looked into weapon convergence yet, try adding
$Convergence:
+Automatic
much as in the provided sample TBM for the Gefjon. Makes it quite pleasant to dogfight in, and one can even throw in Tempests at close range(I added a +Minimum Distance of 750, and the guns are still quite decent close up).