Starcraft 2 is one that comes to mind, especially given its recent expansion
Rome total war isn't exactly for those who prefer base building but the sheer scale of the game is amazing to say the least
Another game from the past few years which looks great and plays well would be Dawn of War 2 and its numerous expansions, smaller scale battles for sure, but they are visceral
There's also the recent Company of Heroes 2 you could look into, quite a demanding game with all of its graphical options cranked up
The Sins of a Solar Empire games are also worth checking out, the scale of the space battles in those games are breathtaking as well
Also depending on how many friends who play, popular MOBA games like DotA 2, HoN and LoL would...