Out of curiosity, here is a list of what comes to mind and bit of research. The idea is to correct it and keep it somewhat updated.
Also credits to @Captbony1999 who recently wrote a post about this.

Note that the main source is Wikipedia/other forums so dates could not be 100% reliable.

Would appreciate any corrections or additions to the list, as my LCN knowledge may not be as extensive as the rest of you. This is my first post.

From what it seems, the Genovese have the largest number of long-lasting members (90+). Surely, this is not a coincidence.

Genovese Family

• Lawrence "Larry Fab" Dentico (1923): Currently alive at age 101.
• Mario Fiore (1924): Currently alive at age 100.
• Mario "Shadow" Gigante (1923-2022): Deceased at age 98.
• Gerardo "Jerry" Catena (1902-2000): Deceased at age 98.
• Michael "Mickey Dimino" Generoso (1918-2015): Deceased at age 97.
• Venero "Benny Eggs" Mangano (1921-2017): Deceased at age 97.
• Vincent "Jimmy Blue Eyes" Alo (1904-2001): Deceased at age 96.
• Louis Arminante (1929-????): Not sure if alive at age 95. (not reliable)
• Louis "Bobby" Manna (1929): Currently alive at age 94 (almost 95).
• Dominick "Quiet Dom" Cirillo (1929-2024): Deceased at age 94.
• Albert "Kid Blast" Gallo (1930): Currently alive at age 94.
• Victor Colletti (1931-????): Not sure if alive at age 93 (not reliable).
• Richard Boiardo (1890-1984): Deceased at age 93.
• Matthew "Matty the Horse" Ianniello (1920-2012): Deceased at age 92.
• Peter "Philie Aquilino" DeFeo (1902-1993): Deceased at age 91.
• John "Johnny Sausage" Barbato (1934): Currently alive at age 90.
• James "Little Guy" Ida (1940): Currently alive at age 84.
• Vito Genovese (1897-1969): Deceased at age 71.

Gambino Family

• Stephen "Stevie Coogan" Grammauta (1916-2016): Deceased at age 99.
• Thomas Gambino (1929-2023): Deceased at age 94.
• Joseph Arcuri (1913-2007): Deceased at age 94.
• Joseph S.Barranca (1929-2022): Deceased at age 93.
• Pasquale "Patsy" Conte (1925-¿¿2017??): Death year not reliable, would be deceased at 92. Some 2022 charts suspected he could been alive back then.
• Anthony Ciccone (1934): Currently alive at age 90.
• Vincent "Jimmy Balls" Beltempo (1938): Currently alive at 89.
• Frank "Frankie Loc" LoCascio (1932-2021): Deceased at age 89.
• Salvatore Franco (1936): Currently alive at age 88.
• Vincent "Blinky" Romano (1937): Currently alive at 87.
• John "Jackie" D'Amico (1936-2023): Deceased at age 87.
• Anthony Scotto (1934-2021): Deceased at age 87.
• Joseph “Sonny” Juliano (1938): Currently alive at age 86.
• Arnold Squitieri (1936-2022): Deceased at age 85.
• Michael "Mickey Boy" Paradiso (1940): Currently alive at age 84.
• Daniel Marino (1940): Currently alive at age 84.
• Nicholas "Little Nick" Corozzo (1940): Currently alive at age 84.
• Leonard "Lenny" DiMaria: Currently alive at age 83.
• Dominick "Skinny Dom" Pizzonia (1943): Currently alive at age 83.
• Joseph "Jo Jo" Corozzo (1942): Currently alive at age 82.
• Louis "Big Louie" Vallario (1942): Currently alive at age 82.
• Rosario Gambino (1942): Currently alive at age 82.
• Domenico Cefalu (1947): Currently alive at age 77.
• Gene Gotti (1946): Currently alive at age 76.
• Carlo Gambino (1902-1976): Deceased at age 74.

Lucchese Family

• Paolo "Zu Paolo" D'Anna (1885-1988): Deceased at age 102-103.
• John "Cockeye Benny" Malizia (1912-2009): Deceased at age 97.
• Anthony "Bootsie" DiPasqua (1912-2009): Deceased at age 96.
• Christopher "Christie Tick" Furnari (1924–2018): Deceased at age 94.
• Armand "Armando" Casoria (1919-2011): Deceased at age 92.
• Joseph "Joe" Abate (1902–1994): Deceased at age 92.
• Vic "Little Vic" Amuso (1934): Currently alive at age 90.
• Vincenzo "Vincent" John Rao (1898–1988): Deceased at age 90.
• Matthew Madonna (1935): Currently alive at age 89.
• Joseph "Joey D." DiNapoli (1935): Currently alive at age 89.
• Salvatore Avellino (1935): Currently alive at age 89.
• Anthony "Bowat" Baratta (1938): Currently alive at age 86.
• Anthony "Tumac" Accetturo (1938): Currently alive at age 86.
• Anthony "Tony Ducks" Corallo (1913-2000): Deceased at age 87.
• Stefano "Steve" LaSalle (1888–1975): Deceased at age 87.
• Alphonse "Little Al" D'Arco (1932-2019): Deceased at age 86. (informant)
• Aniello "Neil" Migliore (1933-2019): Deceased at age 85.
• Frank "Big Frank" Lastorino (1939-2022): Deceased at age 83.
• Tommy Lucchese (1899-1967): Deceased at age 67.

EDIT: Lucchese old-timers added. I'll continue with the rest of the 5 families.
Any corrections or new names are appreciated.

Luigi "Baby Shacks" Manocchio is 97 years old and still kickin.
Gennaro Angiulo Lived to 90 years old.
Francis Patrick Salemme lived to 89 years old.

Paolo D'Anna (Lucchese) lived to 100 years old too I believe.

Gambino names added. Not as long-living but there are some old-timers still alive and kickin'.
Also included some other genovese guys such as Vincent Alo and the major bosses of each family in blue.

Thanks for the answers. I'll add the names once I get to each family.
Want to end with the five families first.

Gaetano "Corky" Vastola (1928) 96 years old

Some of these guys should be contacted for an autograph. I would pay to receive their addresses. I mentioned on another thread I sent letter to Senter and Testa, Basciano and someone else, I didn't hear back.

Lucchese names added.

Very interesting the name of Paolo D'Anna.
Apparently, Al D'Arco mentions him in his book due to a meeting that took place at D'Anna's home in 1988 when he still was alive.

Until now just knew of Sonny Franzese and James Lanza dying 100+.