One of the stranger heroes to fight Golden Age gangsters had to have been Yellowjacket. The character apeared in Jack in the Box, Fun Comics, and 10 issues of his own self-titled magazine: Yellowjacket Comics, all published by Charleton publications. According to Wikipedia:

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"Yellowjacket's secret identity is crime writer, Vince Harley. After a group of jewel robbers attempted to kill him by pouring a box of yellowjackets on him, he found that he had gained the ability to control yellowjackets, and used that ability to fight crime while wearing a yellow costume with a distinctly "yellowjacketian" black and yellow striped cape."