My opinion of the best for each class in PvP ( Top 3 choices if possible)
Juggernaut Tank: Xzander, Tarnaa, Tal'rinder
Juggernaut Dps: Wolfenstein, (Can't think of anymore drawing a huge blank on this atm)
Marauder: Lafayette, Frequency
Sorc Healer: Kyarra, Vulpes, Lilu
Sorc Dps: Chilled, Rekursion
Assassin: Huungsolow, Nakitomi, Dizom
Merc Healer: Donna (have played with merc healer in the mornings lately but the name is escaping me)
Merc DPS: Deebs, Chasso (these two are very close either one could be the best)
Op Healer: Keiki, Sittin-on-Toiylet, Beckett
Sniper: Mastachafe, Obejudian, Bilski
I didn't add Powertechs, Op Dps, or Sin tank simply because there are to many of them or none of them. Zenod and anyone else that made a list that I didn't mention: I haven't played many matches with or against you to add you this is based solely on who I play and see the most often.