My old man says Clemence was world class, Grobbelaar was inspirational but Allison is better than both and that's good enough for me.
In my time we had goalies who could make amazing saves but were inconsistent eg David James. Others had long careers but not good enough at a top club eg Brad Freidel, Scott Carson and Simon Mignolet.
Jerzy Dudek has a special place in my heart for Istanbul and Pepe Reina was a revelation for a couple of years but developed weaknesses and dropped his standards.
Then there were the rest, ranging from the average Sander Westerveld and Brad Jones to varying degrees of losers - stand up Bogdan, Adrian and Karius.
We have been blessed with Allison and Kelleher as his deputy. Fingers crossed with Mamardashvila.