The peatiest whisky available on the market at the moment, in terms of phenols in ppm, would be the Glenmorangie-produced Ardbegs, i.e. the Ardbeg Very Young bottlings (six and seven years old, etc).
The malt specification for these was set at 50ppm (yes, the same as Laphroaig), but bear in mind that much of the phenols are lost in the fermentation and distillation process. Ardbeg elected to mill and process their grain differently so as to retain the husks, thereby effectively increasing the level of the phenols left in the wash.
Octomore and its variants (Bruichladdich are doing a fair bit at the moment!
be higher, but they are obviously not presently on the market.