I'd add "The War That Never Was" to that list. It focuses more on the flanks of the war in Europe - Norway and the Adriatic, IIRC. Really interesting and well written, and a nice break from Germany. "Vortex" is probably my favorite military novel ever, and "Arc Light" is a great post-Soviet US vs Russia war book.
Another weird one was "Cauldron." US and Poland vs France, Germany and Russia. Too weird for me to really enjoy.