I used to love Company of Heroes, the OG. I'm specifically looking for RTS games in WW2, so no sci-fi/fantasy stuff. Got started thinking about this again from another thread here. Would love any recommendations!
Men of war and sudden strike come to mind. Its not quite the same style as the others but I would recommend Hearts of Iron IV. Very addictive game especially how events can take the alternate history route. Also if you have ever played the wargames genre then I would definitely recommend Steel Division. The games can be quick or take a long time but the tactics and planning you have to put into it make it an awesome experience.