Who has the worse chin between these Heavyweights

Moorer
Morrison
Norton
Klitschko
Lewis

I wouldn't really rate Lewis among these chins really. The two ko's were essentially flukes....and he held up pretty well over all throughout his career.

 

Morrison
Moorer
Norton
Klitschko
Lewis

 

you gotta rank them by logic, depending on who got stopped by worst possible in their prime - those who got -

1. destroyed by multiple fringers - only Wlad K
2. stopped by good contenders - Moorer
3. destroyed by top contenders - Morrison
4. stopped by top contenders -Lewis, Norton
Lewis is better chin than Norton so he is top.

from worst to best - Wlad K, Moorer, Morrison, Norton, Lewis.

 

Wlad and Moorer undoubtedly had weak chins, Morrison did not have a solid chin but his KO losses could be partially attributed to stamina and carelessly letting his hands go and leaving his chin unprotected. Norton I can't comment on, haven't seen much of him tbh.
Lewis had a decent chin, his two losses were a result of underestimating his opponent and not preparing properly (Rahman), if he had a weak chin there's no way he could have gone to war with Vitali, Mercer and Bruno and still won.

 

Moorer
Morrison
Norton
Wlad
Lewis