Stealing this from another Server's forums, But post who you think the best of their class is PvE wise. I'll start, These are people I group with most.
Note: these are in no particular order
Champ - Buromier, Thorad
Mini - Mely, couple more I can't think of their names right now
Cappy - Irridian or Lof
Guard - Hergof, Balberg
RK - Wonderr always lets me DPS...what a nice guy xD
LM - Tsubaka....No just kidding it's Ve for sure
Warden - Hardly group with any wardens but Priphea is the best warden I know
Hunter - Baelass and Barefoot Aggropuller....Idk if his name is a good thing or not xD
Burg - MrBoom is good I think, he does what burgs do which noone knows about cept burgs. knows all the fights plays epic music..Overall fun time
There are more good players I can't remember their names atm, so don't be offended if I forget you! I tried to include only "activish" players.