Two of these cases are about the appellant relying on a sign near the location of parking, that was closer than the CPZ sign. Your last one is about missing signage. There is no guarantee that you'd win citing some or all of these cases. Your case seems to be that you passed the CPZ entry sign some way back, probably missing it in traffic, and then passed no other signs before parking. Therefore your case would be based on the size of the CPZ being totally against council guidance on CPZs.
Of course, you have the absolute right in law to take them to London Tribunals, but must first go through the process of getting formal reps against a Notice to Owner refused. Are you the owner as per the V5 Registration Certificate for the car.