I have 2 that are close. A Romanian TT33, and a modern FNS 9mm.
In the case of the TT33, the only malfunctions were due to ammunition of dubious quality, namely hard primers. This particular ammo was difficult to fire in multiple handguns, with a second strike almost always igniting. I have literally never had a fail to feed, extract, eject or stovepipe with this handgun over some 3000 rounds or so.
With the FNS, I have also had some clearly ammunition related hiccups while testing handloads to find the minimum power to reliably cycle or working up a load from start charge. Other than that, I have carried and test fired this handgun in some pretty deplorable conditions with a handloaded version of my standard defensive ammo with zero stoppages. Adverse conditions tested include immersion in directional drilling fluid (water, bentonite clay and microballoon polymer), light icing of exterior components, excessive dust, debris (spruce needles)in magazine, powdered snow in mechanism, and -30F temperatures. Took it all in stride. This in addition to over 10K "standard" target ammunition in "normal" conditions and a cleaning regimen that basically consists of hosing the moving parts with starting fluid followed by a light lubrication with liquid wrench or CLP. This thing is bomb proof.