Another duo:

 

Considering the collective genius exhibited in this thread, I am astonished that this one is as yet unanswered. The first clue was: Google is your friend. Another clue: The actor shown was the first to play the role on radio. If I had named his successor, it might have been a dead giveaway. Maybe not, however.

 

The Great Gildersleeve

 

Famous duo:

 

Amos and Andy

 

View attachment 896998 View attachment 896998

 

Gun Smoke

 

Have you thought about taking a shot at Jeopardy?

 

Think about this one.

 

Famous movie character:

 

Musical group.

 

Famous duo:

 

Nope.

 

I was going to offer Dick Tracy, but when I checked a Google Images for a suitable image................! Better something else.

 

Ben and Jerry.

 

Okay then. This rebus represents the name of a musical group. Think rock and roll.

 

It is a rolling stone...
but that's a magazine.

 

I was unable to find an image that showed SEVERAL Rolling Stones. So The Rolling Stones is the answer.

 

Both radio and TV.