Well, if you do not mind abusing and potentially destroying the knife, I would say that my Adventura is the most versatile. I carried and used that thing before I developed a proper respect for knives.
the swedge on the top of the blade makes a very good flat screw driver, but this use will bend the tip (and did).
The slots in the blade make for great wire breakers.
The recurve blade allows for some pretty hard cutting, and the VG-10 held up to some horrendous cuts (wire, aluminum sheeting, you name it).
The SS handles made for a reasonable make-shift hammer for driving small brads for assembling frames.
The interesting and slim design also made for a reasonable dress/office knife. I received many positive comments regarding this knife.
Yeah, that knife served me quite well, and I still have it. It performed a LOT of tasks and while the tip is bent, I never really damaged the knife otherwise.
I think many knives can be quite versatile if you are creative and willing to risk everything to get the job done...not that I think it is a good idea, just saying that they are all pretty versatile if you are ignorant and creative enough
I have retired it now. I will hopefully always have it...some day perhaps I will buy another Adventura that someone choose not to abuse.