Yes I feel the best Ali we saw was the best Heavy ever...

And although I never met him, I met Ali's Doc (Pacheco) and he said Ali was 6'3'' not 6'2''.

Ive already gone througfh the size differential in several threads but in brief summation:

The primary contingent of 1970's heavyweights were over 6'2'' with the average being 6'3''. There werre some exceptional variations in the form of Frazier and Liston but most were big guys. Weight was pretty comparable too, so the "huge" advantages in modern boxing are nowhere near as huge as they were over 20's 30's 40's 50's and other heavies.