I'm pretty biased here...some ppl are fairly prominent but have bad gear, or too good of gear to know.
WL: 1. Mobic 2. Argentum 3. NobunagaOda (needs to be more aggressive .-.) + TerrorScythes is decent as well. I can't be too sure, mobic and arg know who to target and when to cap xstal (so they mvp a lot), there are some aggressive wl's with unsatisfactory gear that definitely hold them back from their true potential.
AM: 1. Jeeve (efficient killer) 2. Aurore (seen tanking entire teams- the 1 or 2 times I played with him) 3. Mid (might be higher but I dont see him enough to know)- honorable mention to ad4m3 whos gotten a lot better...
DS: 1. I liked 2kmol (sadly he left bracket and disappeared from quill) 2: Fayde (just appears and disappears like a ninja e.e) 3.RyuuNoOuji (should get more aggressive, and I think he just left) + Apocalypse a.k.a nublet (not horrible, knows when to slip and use the appropriate skills, but needs to spend less time capping xstal and focusing on helping the team). Some might be higher if they got better gear, otherwise they just don't stand out.
PP: I only see Aski these days, but there were a few female pp's that were extremely tough (pretty much impossible- solo) to kill like DestinyEnds, DrMegan and some others e.e...as dragon they rarely ever missed even when I had 2 buffs on.
Temp: 1. Goku (disappeared) 2. Gakujin (irv) talks too much ~.~ 3. ?
Dmn: 1.Gerard, the rest are not as aggressive (hard to know as a DS) but sometimes ppl like Tsukihime were getting a ton of kills against warrior types, Zeldrich and Daedra might be good but I dont see them enough.
SS: 1. Allur3 2. Sin (if he comes back). notes: 3star is getting more efficient at cloaking, mongoose, and weasel dodging. Ichiki will be a lot scarier with higher fortified guns, Horatsu knows who to kill. But just not as frustrating when I remember trying to kill cy, sin, allur, grim. They knew when to buff, root, track shot, weasel dodge (perfectly&extremely quickly)at the right times.
Mystic: 1. Konoha (did he leave bracket?) 2. Um there are some that vine me when they know I need xstal, some that aoe rly accurately, I don't remember who (sry e.e) but they know how to play pretty well and utilize forms/skills.
Not absolute, I don't play often so I don't see many people e.e