I don't have anything against any of the stats that you like to use. IMO, they are all good stats. However, if you're looking for the pitcher who had the best season, you have to try, as best as possible, to eliminate factors that are out of the pitchers control. Yes, it gets complicated, but that's why we have the stat geeks.
If you want a good measurement of what actually happened on the field, the consensus is that bWAR does a better job of that than fWAR. Kluber leads Porcello by a good margin there. Personally, my preference in WAR is fWAR.
That said, it really is pretty close.