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Sharpest vs. which is the thinnest to slice are two different things. Sharpest is my Seamus Knives Cracked Uber. My thinnest bladed knife is my Delica.
Technically my fillet knife is my best slicer.
For carry knives it would be
My sodbuster Jr ( nice thin grind and some major belly to it )
My buck 110
My vic Gardner

Leaving kitchen knives aside, Opinel No. 9 WOULD be the winner of my knives, but I don't give it a lot of love and it's often somewhat dull. On any given day, my best (as long as the cutting medium isn't too deep for it) is probably my HAP40 Dragonfly, which is pretty carefully maintained at 12.5* per side with a 15* microbevel. Just kind of falls through most material.