I have had some Benchmades that were dull out of the box, but for the past few years, I find Benchmade now has among the sharpest out of the box knives I own, in particular my 710SBT, and all the Benchmades that I own in 440C steel). Most of my Spydercos have been extremely sharp, but believe it or not, I've had a few that I really had to work on to get sharp (including a SS Dragonfly, a '98 Endura, and an old AUS-8 Delica). All of the above Spydercos were plain-edged versions, BTW.
Kershaw usually has very good edges.
Cold Steels are usually very sharp but the only fixed blades of theirs i own are a Kobun and a small neck knife.
SOG also normally has excellent edges.
I've had some Buck knives with very sharp edges and some that I had to work a lot on. Off-topic, but I notice that sometimes Buck's 420HC steel rusts more easily than their satin-finished ATS-34, which is strange, since one of 420HC's strengths is supposed to be its corrosion resistance.
I had older Schrades that were very sharp, but most of the more recent ones I've had seem in various degrees of dull (all traditional pocketknives).
I absolutely love Chris Reeve Knives, but I had to reprofile my Sebenza edge a lot in order to get it to cut properly; the out of box edge was way too thick. Now it's no problem and this knife is simply outstanding.
Jim