People are getting caught up on what was 'PC exclusive' and what was 'multi-platform' and it doesn't matter.
The reason why you and Logan Westbrook utterly fail at coming up with examples is because you don't distinguish between ports and non-ports the same way most of the PC gaming master-race do. Almost every Valve game is an FPS and all of them are 'PC-native': they have been ported to consoles, calling some of them 'multi-platform' fudges it and misrepresents what they are, which is PC games first and foremost. All of them innovate well beyond any console-native FPS titles of the last ten years.
PC gamers complain constantly about console ports: console-native games that are ported to PC and are less than they should be because of their console origins. Console gamers rarely complain about the reverse because let's face it, PC developers face higher expectations from their market and are more considerate; the end result turns out better. Multi-platform games on the console are nearly always better when they start out their development as PC-natives and multi-platform PC games near always turn out worse when they're console-natives. Only games which are truly multi-platform from the very start of their development are neutral on this and can be judged on entirely on their own merits and not the platform they are for: Arkham Asylum being the perfect example.
In recent years because of unwelcome console-native saturation it's harder to think of examples of PC FPS innovation; we have to keep pulling out oldies like Thief, Deus Ex and the Jedi Knight series, with newer titles like Prey, STALKER and FEAR being more ambiguous about whether they're PC-native. Our domination of all things original and creative has been greatly helped by our modding communities, which have continually been bashed into the ground by ungrateful developers and publishers locking up ever more content in order to put a price tag on things we used to get for free simply because console owners bend over and take it.
We've gone from being heroes for winning lower prices on games down from £50-£60 fifteen years ago with our constant whining to being pariahs because now our whining is directed elsewhere: we're not longer demanding better from developers as much as we are demanding better from our console-owning cousins who seem determined to be ripped off at every opportunity.