Sam Giancana was the greatest, most prolific gangster in Outfit history, one of the top three in cosa nostr history period. He Did more during his 8 year tenure as chief Guy than aiuppa or accardo did throughout their entire lifetimes. This is not debatable. His only fault was skipping town. It was an unfortunate knee jerk decision that came back to bite him in the ass.
And yes, he should Have knocked down those frugal grand Ave shit heads when he had the chance. He would have crushed them had he moved in on them at the proper time.