One personal favorite has to be shadow of the colossus.
To touch lightly on the soundtrack.
The opened way is the initial first boss theme of the game and presents the combat pretty nicely once you manage to exploit the colossus weakness.
Along with a despair filled fairwell that takes place on the bird colossus.
Assassin's Creed 2 or The Last of Us
Frank Klepacki. Old C&C series.
All of Deus EX
Really enjoying the sound track on NieR Automata.
Definitely Guilty Gear.
But Mad World was pretty sweet too.
I've always been a big fan of the Dot Hack//G.U. ost
Sonic Forces Main Theme
Doom, Halo, Timespiltters, Fable,, Beyond Good and Evil.
Oh and Devil May Cry 3