Kat, I'm sure you've seen a lot of Civil War roster sites. I like this one.
My husband has a lot of ancestors from WV (Kanawha area)who fought on both sides of the battle. I'm sure you probably know this from your research but the Confederacy did not recognize West Virginia as a state so you'll have to look under the state of Virginia for those soldiers. You will probably only find Union soldiers under the WV rosters.
Good luck and if I find anything new during my own genealogical searches I'll let you know.