Can you be an all time great if your best win is against Jeff Lacy?

[Nameless]

Calzaghe is an all time great, Kostya Tsyzu I don't think so.

I dont consider Joe Cal an all time great but he is definitley closer than Kostya.

Well, I have to disagree there, never lost, close to Marciano's record, schooled the Viking Kessler, which nobody has see coming (for the schooling, not the win), won against B-Hop... you have to place him with the all time greats even if might not be on the top of the top.