I had best impression from these four during time... Rox, Getek, JeongWa, FlyOver.. Not necessarily in this order, because everyone of them could beat the other 3.. They all played very smart and really wanted to be good, enjoyed the game.
Althought Im sure the list isnt in any way complete... Germans and North Americans had plenty of excellent and experienced players in the old era, I believe many of them better than these four I have mentioned...
In current times if I would have to say one name, I think Bjorn/Fyrk is good, Sqz (If he would not be so noisy/anoying :p) and Fear is promising.. Others I dont know so well