There isn't a best in my opinion, just a lot that are capable of beating anyone, and the people picked are mainly done like a popularity contest. So in an unbiased way mine are as follows, which doesn't mean they are the best.

8 arc- can't decide
9 arc- its_me (when he doesn't play that safety crap he is quite decent)
8 us- cyphanes (only player that I feel has matched me in this)
9us- justforplay
8uk- andyw1
Killer- lee when he is on lol, beenjamin
Straight- dvz
Best overall- don't think there is one imo
Best personality- gotta be Jim lol
Most improved- again Jim
Best clan- chips obv lol but uprising is a class outfit aswel
Best mod- few decent ones
Best admin- cloone and fastboysam

Again there are loads of good players and none I think are THE best, I have just named a few that I think are good atm other than me lol.