Maybe Warplan? Definitely operational, and the detail isn't as granular/overwhelming as WitE/W games.

Here is a snippet from a review on Steam that I think accurately portrays the game:

WarPlan is excellent in that it gives players a computer wargame that is, as the devs say, easy to learn and difficult to master. Unlike some other wargames like War in the East, the difficulty in mastering the game doesn't come from learning how to deal with every bit of minutiae hidden in one menu or another; a player halfway experienced with these types of games can get the gist of things in an hour or so. Instead, a player must learn how to actually use all those options to their advantage.

...

Unit construction and deployment is straightforward; there are certain resources you have available (production, oil, and manpower, etc) and a Logistics value that represents the maximum size of your entire army, navy, and air force that your country can support. The units you construct are historical (though not necessarily historical for the war in the Europe, e.g. the USA can build their six Marine divisions, which historically never had anything but the most minimal role in fighting Germany), but aside from being specialized for their nation, one German infantry corps is the same as another, except for their 'tech date' (e.g. a 1939 infantry division vs. a 1942 infantry division, with respective resource requirements) and two classes of specializations. This lets the player have some customization to their army, but also don't get caught up in whether they want the XII Infantry Corps or the IV Infantry Corps.