How complicated you after? Check out "Crown of Glory" available now and patched twice from Matrixgames, it also has a 2 phase structure (per TW series) containing detailed strategic & uncomplicated tactical combat. (2d graphics).
"Histwar:LesGrognards" has been long in coming but well worth watching for, it is going to be detailed field set battles, tactical combat with map/battle/oob editors I believe. Now slated for Battlefront to publish. (3d)
Matrixgames has a few older titles too
Madminutegames makes "Take Command - 2nd Manassas", Civil War 3d tactical brigade level which also has a complete editor. Demo available on their webpage.