Let's see here.

Frank DeSimone
Cola Schiro
Agree on Stanfa
Joseph Pinzolo whose only known orders were 'give me whores Joe Valachi'

Just kidding. After reading The Valachi Papers, I feel Salvatore Maranzano never got enough credit. He was educated and invented the hierarchy that has allowed Cosa Nostra to live past any other American crime syndicates. Furthermore, his moves against Masseria were calculating and efficient, true to his businessman nature - he made a smart move taking out only the chief confidantes to Masseria, the war was over fast!