Most of the focus here is on Jack's great supporting cast but we should also recall his tremendous writing staff. This is a tribute to one of Jack's greatest writers, Ed Beloin who wrote for the show from 1936 to 1943.
Edmund Beloin was born just down the road from me (but nearly 50 years earlier) in Startford, Connecticut. When he came to Jack's show in 1936, Beloin and fellow new writer Bill Morrow had an amazingly thin resume mainly consisting of selling jokes to various comedians. Given that Jack was THE radio powerhouse in the mid-1930s, it's hard to figure why Jack settled on Beloin and Morrow for one of the most sought-after writing jobs in radio. But Jack saw something special in Beloin and Morrow and his faith was soon amply justified.
It's not an overstatement to say that Ed Beloin and Bill Morrow created the Jack Benny character, as we came to know it, and the modern situation comedy. Before Beloin and Morrow, Jack's character was a glib, fast-talking, wise-cracking jokester. Benny the miser, Benny the coward, Benny the braggart, Benny the horrible musician simply did not exist. While Jack was always funny and his show was entertaining, there was nothing particularly special or unique about the pre-Beloin/Morrow program.
Jack encouraged Beloin and Morrow to add just about every negative human attribute possible to the Benny character and to make him the butt of most of the jokes. And did they ever. This was revolutionary in situation comedy and it has formed the basis of most of our great comedies since from Lucy and Jackie Gleason to All in the Family and Everybody Loves Raymond.
Beloin himself came up with many of the oddest and most memorable routines on Jack's show, from Carmichael the Polar Bear (apparently inspired by Ed's visit to the zoo with his niece), to Mr. Billingsley, the bald guy who was knocked on the door to deliver silly jokes in a deadpan voice. More significantly, Beloin is credited with the creation of Phil Harris's happy-go-lucky character (Phil at first played his character much more seriously in line with previous bandleaders) and the introduction of Eddie Anderson's Rochester character. Ed's arrival also coincided with the change in Mary's character from a Gracie Allen-like ditzy woman to Jack's sharp-tongued sarcastic foil. Lastly, it was during the Beloin/Morrow years that the Benny-Allen fued started.
By 1943, Beloin, Morrow, and Jack came to a parting of the ways, apparently mutually agreed upon (although who ever knows with such things). While Jack had years of success with a new team of writers, Ed Beloin also had many years of success as a movie and television scripwriter, particularly with Bob Hope, Bing Crosby, and Jerry Lewis. The list of Ed's post-Jack credits is daunting:
Lady on a Train (Deanna Durbin)
The Harvey Girls
My Favorite Brunette
My Favorite Spy
Road to Rio
A Connecticut Yankee in King Arthur's Court
Top o' the Morning
The Great Lover
The Lemon Drop Kid
Visit to a Small Planet
G.I. Blues (Elvis Presley)
Ed was also a principal writer for some less than inspired 1960s TV comedies, such as My Three Sons and Family Affair.
By the late 1960s, Ed decided to retire from writing. He moved to southern Florida and apparently enjoyed his years of retirement. He died in 1992 in Florida at the age of 82.