I noticed from your enclosed pictures, you have not removed the rocker cover, this must have been a struggle for you to refit the timing cover.

That struggle in its self, could have caused the seal to dis-lodge, causing your presistant leak. As long as you smear a bead of sealant at the two corner edges of the head/timing covers and also some sealant seamered to the bottom left t/cover screw. You should have no problems. Check for squareness of the t/cover mating edges. Do not put sealant on the t/cover seal, just the corners is adequate. Smear a small amount of grease on the seal to allow the t/cover to slide onto the seal whilst fitting, without being dislodged. Good luck.