Cobra? lol give me a break, his name was MARION in that movie...he would get his ass kicked. and John Matrix vs John Rambo? also a no-brainer-in the documentary Commando, arnold was shown to have killed around ONE HUNDRED PEOPLE, including an un-heard-of 80 armed men in 10 minutes time, a feat rivaled only by perhaps the late Charles Bronson in his live-action recording 'death wish 3'....although id give the edge to arnold even there because 1. he was fighting soldiers as opposed to street thugs, and 2. while bronson used only guns (and one rocket), arnold used guns, saw blades, and ax, a pitch fork, a pipe ripped clean off a wall, and his bare hands.
stallone, in all his Rambo movies combined, didnt kill close to as many people as Matrix did in one 10 minute span.
arnold wins.