I'd IDed Bill Ely ghosting pencils for Sal Trapani on Dell's Superheroes #1-2, and my best guess at the time at #3-4 was Bill Fraccio. In his blog, though, Lee Hartsfeld was tracking down Bill Molno ghosting Trapani, and suggested him as the penciller for Superheroes #3. Lee didn't get to pursue that on his blog before he discontinued it, so I'll back him up with this post and say that Molno ghosted #4 too.
I've repeated my IDs of Ely so these lists cover all the data not on the Grand Comics Database. #3's cover is the only one I 'd commit to Molno on, but I wouldn't be surprised if he and Ely pencilled their respective covers on 1, 2, and 4 too.
The writer looks the same for all four issues. But is it someone whose sole credit is this series or is it one of the usual suspects going for a more "with-it," caption-heavy style (and more in the manner of Bob Haney than Stan Lee)?
Superheroes
| Jan/67 | 1 | The Origin of the Fab Four (3 pts) | p: Bill Ely |
| Apr/ | 2 | The Clowns | p: Ely |
| Nutt's Revenge | p: Ely | ||
| Enslaved | p: Ely | ||
| May/ | 3 | (cover) |
p: Bill Molno |
| Meet Coalman | p: Molno | ||
| The Mad Magician | p: Molno | ||
| Nepto of the Reef | p: Molno | ||
| June/ | 4 | The Hypno-Trap | p: Molno |
| Metamorphosis | p: Molno | ||
| Meet Mr. Mod | p: Molno | ||
| Endsville | p: Molno |