All-time:
#1: Bob
#2: Thunder
#3: iCeD
#4: SkulL
#5: Jman
#6: TurtleSlayer
#7: Gummi
#8: FireSworD
#9: SuperSaiyan
#10: SuperJazz

I might actually be forgetting someone, which would be blasphemous... otherwise this list was compiled according to past experiences.

Present/a while back:
#1: SuperJazz
#2: Warrior
#3: Vegito, Grytolle
#4: CelL, FireSworD
#5: Quickz, Slayer, PurpleJazz, Czech

...Listing the best players at the moment isn't easy after the top 3... As there are lots of inconsistent ones.