This is going to sound insane, but Gears Tactics, the Gears Of War spin-off game might actually be a good fit for you. The game straight up copied the combat from the new XCOM games, but it did it really competently. The main difference are all the special abilities your squad members get, which when you are at a high level makes the game turn into figuring out how to min-max for the best chain damage combos.

Not a game you'll play forever, but worth at least a play through of the campaign, so if it's on sale I recommend it.