Mangoose
Arcane
What I like about Company of Heroes is that you control squads. I think this is because gives you some macromanagemnt, which I think is important in an RTS because provides efficient use of units that lets you work on general strategy and tactics.Company of Heroes 1 gave me Red Alert 2 vibes. The series still exists, there was a sequel.
Can't get more RTS than Red Alert 2.
Heck, consider the Total War series. You don't individually control the position of individual soldiers. But you can set general formations, loose/tight/etc, for your unit in a very efficient manner.