I would only count: Bob Hope, Uncle Milty, maybe Dean Martin and Jerry Lewis and I don't think Pinky Lee, Lucy or Soupy Sales would qualify since they are more TV personalities than radio and Abbott and Costello are movie personalities and of course Alan Ladd is drama. So let's say you've got 3 so far (thumbs u I know of at least 4 more ...
Lucille Ball had a popular radio show called "My Favorite Husband" which was later developed into "I Love Lucy" for television. I remember listening to it as a child on Sunday nights on a military base in Japan in a quonset hut, in the 60's with a transistor radio hidden under my pillow because it was past my bedtime. How's that for a run-on sentence?