Oh yes, XCom2 with long war mod (I haven't tried the latest official expansion)! It will test you, you will lose some but the struggle is worth it! When you get small victories that are hard fought, they are worth so much more!
If you are brave (I'm not!), go with the Ironman mode on!
Hey now i'm inclined to get Xcom if I ever got the chance! I'll be sure to let you know if that happens!