Here is my own list republic side.
Best rated guild, Foundation Stone, now FS by far. Hoth Ski Patrol and Aftermath are also quite capable, irregular though they are.
For players:
Guardian: Shino-numa and Colim
Sentinel: Chibiwarrior, Masteromri, Raid-boss
Vanguard: Taurell, Hugh, Bursts, Dosx
Scoundrel: Nynx, Corvae, Shutdownx
Shadow: Strikerx, Qohollete (cant ever spell that name right) and Proposition
Sage: Zendar, Joda, Nuzzel, Jery
Gunslinger: I dont really know any that stand out
Commando: Remnax
The above players in my own humble opinion bring together the right mix of fantastic player skill, teamwork/coordination, tactical acuity and the right attitude. Props to you guys, keep representing