The only non-Korean I could say held his own against Koreans is Guillaume "Grrrr..." Patry, because he's the only non-Korean who has ever won an OSL.
I already answered your question in my previous post. The best Koreans right now? In my opinion? Innovation. Soulkey. Flash. Rain. And you still ask which non-Korean comes close to them?
None. Not even close.
HuK, Thorzain and Stephano competed for EGTL in the just-concluded SPL. They played against Koreans every week during the SPL. Stephano was the "best" among the non-Koreans with a 4-8 win-loss record. He's nowhere close to Korean level. Grubby? Irrelevant since HotS was released.
HotS is a very unforgiving game for those who do not have the best mechanics. So, as far as HotS is concerned, non-Koreans just do not have enough to match what Korea has.
I don't know how else you could talk about SC2 if you get bored with watching the best (the Koreans), while everyone else in the world watches them so they could learn more than just builds.
Edit: By the way, Stephano will be retiring after August 15 to start medical school so yeh, one less of the best non-Koreans.
Medical school huh....thats a long way to go lol. then again he's 20 now unlike my 23 :s.