Alright, so I don't play O&G, but I've faced them enough times to have a good idea about what "works" and what doesn't. Given the models you have, here's a 1000 point list that gets a lot of them on the table:
Night Goblin Great Shaman - level 3, earthing rod = 165
Night Goblin Big Boss -
BSB (banner of discipline), shield = 72
Night Goblin Big Boss - great weapon = 34
Night Goblin Big Boss - great weapon = 34
40 Night Goblins - full command, spears, netters, 1 fanatic = 220
20 Night Goblins - standard, musician, bows, 1 fanatic = 105
20 Night Goblins - standard, musician, bows, 1 fanatic = 105
5 Spider Riders - musician, bows = 80
5 Spider Riders - musician, bows = 80
1 Troll = 35
Pump Wagon - spiky rolla, outrigga = 70
---------
1000
99 models
The concept should be pretty clear: two naked bosses surf the long bus of spear gobs, absorbing hits and dishing out some sweet S5 beatings as the netters help nerf whatever is fighting them - this is your Gobstar! Meanwhile, the great shaman (your glorious LD6 general!) bunkers down with the
BSB in a block of archers and does everything he can to avoid combat, including hoping to the other archer block if his starts to draw too much attention. Elsewhile, the various (excellent) O&G chaff units do chaffy things, though at these low points the pump wagon can be pretty serious, and even 1 troll in support of the Gobstar could help out.
So basically a lot of goblins, some magic, some S3 shooting, some fanatics, some combat "ability", but mostly this list uses nearly all of your existing models, plus is a decent base for wherever you take the army from here
Note: while you could bloat the list up with characters (Skarsnik for example), I would add a few more units first. Maybe a proper unit of trolls (6+) that you feel confident babysitting or a big unit of squigs for combat purposes, some wolf chariots (they are excellent), and certainly 2 doom divers, if not also lobbers. Manglers are also deservedly awesome, though they mostly tend to get shot a lot - which is useful when drawing fire from stuff, but in a goblin list? Not sure what you're distracting cannons from ... unless it's giant(s)?!
- Salvage