Salutation Old World Inhabitants

I have been playing for a few months now and I kinda want another army... I want a Tomb King, Skaven or Goblin army or a goofy Giant army but IDK which one to pick. Also I recently got my hands on a Kurtz on a DeathClaw and IDK what he could Proxy on my Beastman Army. P.s. My Beastmans won a local tournament!!! Sorry for a lot of questions but you all are the smart ones who can help me.