Here's some of what I've got for Reginelli, Rugnetta and Denaro. I'll write up some more on other top ranking guys during the 1950s and 1960s if I get the time:

Marco Reginelli:
- Underboss for Joseph Ida
- The real power in the family behind Ida
- Frequently identifies as the head of the 'Greaser Gang'
- Main activities of the Greasers were numbers, liquor and betting on horse races, as well as seasonal gambling in football, baseball, basketball and boxing
- Was partners with Angelo Bruno in Penn Jersey Vending Machine Company
- Owned the Casablanca Night Club in Camden with Pasquale Massi
- Had Louis Campbell oversee numbers and dice games in Camden

Joseph Rugnetta:
- Served as a captain under Ida
- Partner in South Philly Grill
- Nephew and inducted member Domenic Rugnetta was a bartender at the Grill
- Briefly became acting boss of the family when Ida fled
- His conduct as acting boss made him enemies and the family held an election to replace him
- Demoted to underboss when Pollina took over
- Shifted to consigliere under Bruno and became head of the Calabrian faction
- Still commanded a great deal of respect in the family
- Exercised control over the family's operations in Chester as all members there were Calabrians
- Rugnetta's first wife was the sister of the mother of the Piccolo brothers
- Rugnetta financially helped the Piccolos when their father died
- Rugnetta, Nicholas Piccolo and Joseph Sciglitano delayed an induction ceremony in 1969 because no Calabrian candidates had been proposed and they did not want to go to South Jersey for the ceremony
- After he died, Phil Testa and Nicky Scarfo were caught on tape talking about how, rather than being a neutral mediator, as consigliere Rugnetta had held a grudge against Scarfo and tried to get him killed

Ignazio Denaro:
- Served as a captain in the 1950s
- Owner of the Internazionale Cafe
- Involved in loan sharking and gambling
- Told Bruno that Pollina wanted to cut his legs off, leading to Bruno becoming boss
- Promoted to underboss under Bruno
- Said to be the one in charge of the Sicilians while Rugnetta was in charge of the Calabrians
- Got into a dispute with Bruno in the early 1960s and talked to Rugnetta about it, who advised him to sit down with Bruno
- Instead, Denaro went over Bruno's head to Carlo Gambino
- Denaro was then admonished for going over Bruno's head and told not to do it again
- No-one had told Bruno to make Denaro underboss so he could take him down if he wanted without permission from the Commission
- Bruno and Denaro once got into a heated argument over Denaro talking to FBI agents at his cafe
- It was briefly feared that he would not be able to stand up under law enforcement pressure in the 1960s
- Testa, Scarfo and Piccolo were in favour of hitting Denaro
- Was still active in family affairs by 1969