Less well known are the companies that DC partnered with and or operated, for lack of a better word, covertly. The folks at DC Comics Artists have handy section listing the examples. Here are some examples.
Many of the titles had a harder edge than those that carried the DC logo.
Noted artist Alvin Hollingsworth was a regular on Beware.
The title was also notable for crediting artists and writers. And yes, that's the same Harry Harrison who created the science fiction hero the Stainless Steel Rat.
This one was penciled by the great pulp cover artist H. J. Ward.
The Stanhill line specialized in good girl art and may have been intended for PX sales.