New to the Gitz

Looking to start a gloomspire army, I haven't seen or played against any yet, so no idea what to run.

I'm planning on getting the spearhead box, along with the truggort king to get me to 1000 points. It's not the most amount of models , so wondering if I should switch the king out for something else instead?

Any ideas for a 1000 pts army after the spearhead?