Ruger DA revolver you can strip it down to nothing in no time .With small screw driver .
But you can strip most auto loaders in no time with no tools. I'm a 1911 guy for EDC and love me a good wheel gun as well. But the OP's criteria screams striker fired semi-auto to me, and among those you'd be hard pressed to beat a Glock 19 or 17. Not my favorite gun by any means, but they do seem to excel on all the identified criteria.