I'd be equally happy with any Glock, full-size Beretta, HK squeeze-cocker, or P-series SIG (less the .380's).
In over 15 years of shooting, I could count the cumulative number of jams I've had on all those guns without needing to take off both socks.
I guess that, push come to shove, I'd make it the G17. Ironic, since I've never shelled out my own hard-earned $$$ for a 9mm Glock, but they're pretty much bomb-proof, have the fewest bits 'n' pieces to break or get lost, hold a bunch 'o bullets in a world-wide common caliber and edge out the other competitors in the all-important tent-peg-hammer and wheel-chock competitions, both of which are more common uses for a pistol in combat zones than actually, you know, shooting at folks with it.