Seriously, who would it be outside the norm to have been the designer of the Kingfisher? I will grant the Ice Hellions, maybe the Blood Spirits due to getting a hold of Omni tech, the Mandrills because cooperation, maybe the Coyotes for being too fast in a assault and . . . ?
Early Omni = Yotes or Wolves
Strana Mechty = Bears or Wolves
SFE = Vipers, Wolves, & Yotes
Assault Mech = Bears, Yotes, Jags
Notes as being used by = Bears & Jags
Super Traders & none of the pre-58 Omni's are theres? = Sharks
Unlikely = Speed & Omni = Hellions & Spirits.
No one else has a leg up or down = Adders, Burrocks, Cats, Cobras, Falcons, Horses, Mandrills, Ravens, Scorps
It could be all but those 2 unlikely options, but, I'd say its probably one of the 6 above them for the reasons listed.