I don't know much about the blenders but:

Top two brands for me are Tatuaje and Crowned Heads. I guess EPC and DPG would have to be my top guys. Pete would probably be lumped in with DPG, since I don't know the cigars he blends (DPG does almost all Tats, right?).

Just now thinking about Padron - not sure who the blender/(s)? are, but the 1964 Maduro blender (Jose?) should be tied for first.

So, in no particular order:

1. EPC
2. DPG/PJ
3. Padron

There's a lot of blenders I've smoked and enjoy, but probably couldn't rank them top 3 as of now: Herrera, Nodel (Aging Room Original was a favorite and my #3-4 early on), Litto, Rojas, Espinosa and many others I cannot think of now.