Let me see;
Wizard - Controller
Robotic Invoker - Controller
Vampiric Fighter - Defender
Kenku Rogue/Sorcerer - Striker / Skillmonkey
I can't remember what Bob rolled, it was either another fighter, or a barbarian? I think it was a fighter, though a different build to the Vamp.
So, couple of ranged blasty controllers, a couple of defenders, a striker. Possibly Simon's Dragon-Born, if he makes it, meaning another defender.
So, we're potentially light on leaders and strikers (my Kenku is not optimised for damage, though I'm pretty sure that the defenders and controllers all tend a little more towards striker as their secondary roll, so average damage is probably not terrible.)
I believe the idea has been, for the most part, that screw the party roles, just play something awesome, lulzy or otherwise that has been banging around in your head for a while.
- That said, if you wanted a simple way of introducing yourself, a couple of character suggestions; Andy is playing a Wizard, there may be some kind of wizardly association involved (a mage's guild or so) or if you are feeling confrontational a rival magical-organisation, this would provide an easy route in for any arcane character, particularly perhaps an Artificer?
Tim is playing the Robot-angel-invoker of Tiamat. A Paladin of Tiamat built on the Divine Power build (Ardent Paladin?) is capable of dishing out striker level damage, and would probably still have *some* healing potential. Admittedly, possibly only so much. I'd check, but my character builder still isn't showing Paladin's right, so there we go.