For those inclined to a short, sharp contest with just four players, you might look into one of the eight "Equal Force" (EF) scenarios within HPS Campaign Antietam (HPSCN). In particular, Scenario 188 EF_Battle for Union, Virginia, August 15, 1862. This is a 15-turn, What-If scenario by Rich Walker.
"(What If, 15 Turns) Jackson sends Johnston's and Taliaferro's brigades to secure the crossroads at Union. Pope's scouts have detected this move and sends Schenck's division to counter this move. (A small two brigade level scenario, though the Union has about 400 more men, their quality is slightly less than the Confederates.)"
The two Union brigades are those of McLean and Julius Stahel (Schenck is also present), and Johnston's Brigade is commanded by T. S. Garnett.