If you're interesting in an SI:7 Roleplay, any type of Rogues or Hunters would fit great into <Division Bravo>!
On the topic of simply class/race, not regarding guild or anything, there's tons of very unique options you could choose, Arcane-Rogues, Elemental (Shaman-like) Hunters/Rangers, there's tons of stuff you could come up with.
And for guilds again, here's a list of some guilds you may want to check out (Other than the one I run, listed above.):
<The First Regiment> - Stormwind Army campaign style guild. (GM: Maxen)
<The Eastern Offensive> - Alliance Military RP-PVP Campaign style guild. (GM: Serpico [Special letters I think])
<The Stormwind Guard> - Stormwind Guard-RP guild. (GM: Adroby)
<Stormwind City Watch> - A light-hearted approach to Stormwind Guard-RP. (GM: Xaviros)
<Magus Senate of Dalaran> - Magic and political RP guild. (GM: Zanbor)
<The Citrine Eagle> - Alterac-restoration style RP. Knights, Military, Clerics, all kinds of stuff there. (GM: Zaria)
<Clergy of the Holy Light> - Light-RP guild, Priests and Knights. (GM: Moorwhelp)
<Lightwardens> - Another Light-RP guild, they have some differences opposed to the COTHL, though they're all connected in the Council of Bishops project. (GM: Melchiz)
<The Highguard> - High Elf RP, a bunch of stuff over there regarding Quel'dorei. (GM: Aeriyth)
<Te'Amun> - Draenei RP guild. (GM: Rhuua)
<Nor'kure> - Another Draenei RP guild.
-Varadu