Bitter taste of defeat! So much coolant in the oil pan.

Pull the engine if easier. The one issue I have with the compression test is if there is a hole in the cylinder below the level of the compression rings, it will not show up. And I think a number of the timing cover bolts would hit low in the bore. If you pull the engine or pan and test again, at least you know where to focus your attention.

BTW OP, when you pulled the intake, was there any water in the valley? If the intake was leaking it would go down in the valley and be obvious.