Ok, my turn (couldn't do 5 so here are the top 10 by size).
Bigger gyutos:
Heldqvist 270*64 - wrought over 135cr3
Yanick Puig 265*56 - vintage iron over 135cr3
Merion Forge 255*55 full tang - dammy clad over 1.2562
Milan Gravier 250*55 full tang - deep etched twist clad over 135cr3...