I'm just rambling in with my .95 cents, don't mind me for repeating some points that have surely already been made, or for just rambling.....
I suppose in order to address the O.P's inquiry of 'best breeder out there' one would need to define 'breeder' and in this case specifically, 'cannabis breeder.' I suspect that most breeders of legal agricultural commodities may look in on the world of cannabis breeding and scratch their heads in confusion at what it is we're doing over here. We don't really appear to have much of an oriented goal as far as an agricultural community is concerned other than creating as much 'fire' as possible. But 'fire' isn't really a descriptive term I suspect many breeders of legal commodities apply to their breeding process or the traits they are attempting to refine or stabilize.
I see breeding as the selection, refining and stabilization of desired traits among the offspring. Putting pollen from 'fire' cut A. to 'fire' cut B. and creating a smeared mish-mosh blaze of heavy resin production, heavy terpene profiles and heavy flowers isn't really what I would consider breeding, that would fall into the category of what I'd consider 'pollen chucking.' Especially with how many 'fire' cuts there are out there. If this were the case we'd literally be defining breeders by their geographical location and the amount of 'fire' cuts they have access to, which in many cases is what I believe is defining many of the breeders out there right now. Just because someone lives in California or Oregon and has a buddy with a 10,000 square foot warehouse to open pollinate in that doesn't make anyone a breeder Imo, it makes them an opportunist.
I consider breeding the refining and stabilization of certain traits to the point of no more than 5 and typically less pheno's per pack of 10 seeds with perhaps as many as 7-10 sub-categories of classifications of pheno's per strain. What I mean by this is that if you were looking for a particular pheno from such and such seed stock, if it was 'bred' with intention, you should be able to find that pheno in no more than 2-4 packs. (There appears to perhaps not even be any standardization in our agricultural community that defines what breeding is). I would also consider someone a breeder if they were attempting to eliminate certain traits from the gene pool all together despite attempting to refine certain traits. Perhaps you want mold resistance, or shorter plants but aren't concerned with refining any traits but rather eliminating certain ones.
Also, having massive selections to choose from doesn't make a breeder. That makes a very successful pollen chucker, Imo. But if you ask me, "every successful breeder started out as a pollen chucker, there's no way around it." -Jd Short
