I think the Bessers held my interest because I'm a Stooge fan and interested in Columbia comedy shorts, but I can't really argue with anything you said. Joe Besser is best suited as a comic relief or supporting character like Stinky, he just can't carry a film by himself based on what I've seen. Still, at least he has a character, unlike Derita. I would say the whole idea of a man child comic was perfected by Harry Langdon, and Besser is best as Stinky when he completely rids himself of the man part and completely becomes the child.
As for Hawthorne, he freakishly looks like my best friend, so I can't look at him the way the average comedy fan does.