Space Wolves first, 2 companies worth and a bunch of support options for them, That's about 4000pts worth and I still have another box worth of Tactical, Assault Marines, Rhinos, Land Raiders, Dreadnoughts, and Vindicators. I think.
Imperial Guard next, my main 2 boxes of stuff that I pick my forces from. Add in my 2 Warhounds and warlord from one of the other boxes and there's about 9000points there and that's just what's been sorted out fixed up a little. (I really need to find some more Leman Russ Tanks to make it up to a company instead of subbing in other stuff.)