Bottom bracket creaking only when pedaling hard. When pedaling with a decent amount of force a very loud creaking sound can be heard coming from the bottom bracket area (it is very loud when standing on the pedals). It makes a creaking noise on each foot's down stroke. So with both feet pedaling equals two creaks per full revolution. If I unclip either foot and pedal with only one foot, a creaking noise will be heard once per revolution (on the down stroke of the pedaling foot). If I pedal softly, no noise is heard.

Things that I have done so far, yet the problem remains:


Changing pedals, regreasing their threads and making sure they are tightened. 
Tightening chaining bolts. 
Replacing the actual crankset.
Taking the crankset out, cleaning all the old grease and regreasing. 
Making sure the crank arm is tightened correctly. 


Is there anything left besides it being the bottom bracket causing the problem? I haven't had a chance to inspect that yet because it's a pressfit and I don't have the proper tools to take it out and reinsert it.
Turns out it was the rear skewer of all things causing the creaking! It seemed like it was from the bottom bracket area because it was in sync with my pedalling but I put a dab of grease near the contact points of the skewers and the noise is gone. 

So if anyone else is having similar problems, check your skewers first because it's a lot easier than taking your cranks and bottom bracket apart.