That second map is wrong on several counts. It says “French” between the Custer and Calhoun positions (the latter of which is also wrong): Captain French was with Reno in the charge in the valley, and didn’t even get to the Custer field until three days after the Custer fight, when he and other 7th Cavalry troops were part of the burial parties. That map also shows Keogh as being south of Calhoun, when the opposite is true. Calhoun’s L Troop was part of the Keogh battalion, or “right” wing, and was deployed as skirmishers while Keogh’s Troop I and Harrington’s Troop C were held in reserve in the swale to the north of Calhoun. The map also shows the Custer force heading north as one complete force with no separation down Medicine Tail Coulee.
French was certainly with Reno, you are correct there.
Movements between Keogh’s and Calhoun’s troops are debatable as we only really know where they fell.
I think the 3rd map is the best. I should have looked closer at #2 before posting it. It also shows the split better and Custer’s supposed movement towards where the National Cemetery is located to find another ford.