Indeed. Definitely him too (I forgot, sorry!). Like I said....hard to narrow it down to 10. I'd need side-by-side comparisons of the same plants or something. Or possibly some kind of categories.
That's just the people I know about though. There are some great "secret" growers (i.e. not on the forums) in the US, Germany, and Japan. I didn't even know about Yamada until a year or so ago, but his plants are absolutely fantastic.