It's all about opinions but I know several 40 years + Cobblers fans who think he's the worst in that time, could that be the answer ?
Without prejudice You did have a lot of criticism for Cornel! There was enough on here who thought Cornell like Mitchell were ok. As you rightly point
out it’s all about informed opinion. Have been watching off and on since the 50’s and both above ‘keepers fare reasonably well with past keepers. For example Gleasure, Brown, Smith,Woody, Elvy and Pickering are comparable ‘keepers - IMO of course!