I'm going for Henkei Octane mostly because his name is Octane* and not freakin' Tankor! I'm sick of Hasbro making such stupidly simple mistakes and they're not getting my money for this one.

*Actually called Octone which is Octane's Japanese name. Octone = Octane as much as Convoy = Optimus Prime, Meister = Jazz, Wave = Swerve et al.