... but I'd like to nominate a comic for the title of Most Tenuous Link Between Cover Image and Actual Story.
It's a much-bandied-about fact that the covers for Silver Age comics, and especially Silver Age DC comics, were occasionally drawn long before the story that they were connected to was even written - that the cover was essentially used as the seed idea that the story was later grown around. I've certainly encountered plenty of olde tyme comics that were probably put together in that way but this is the one time that I am absolutely confident in pointing my gnarled finger and screeching like Donald Sutherland at the end of Invasion of the Body Snatchers.
First, the cover:
Within, the number one story (Mystery in Space being an anthology comic) is entitled
The hero: a brown-haired, strong-jawed dude, but not the same brown-haired, strong-jawed dude.
Whoops, I guess that image doesn't really show his hair colour. In any case, it's not the same guy and he has to run around getting the titular seven wonders for those evidently lazy aliens. And the wonder on Mercury is:
And that's about it for the jewel-folks, which probably means that this is the only Silver Age comic that I can think of that features the (implicit) death of the standard-issue leggy dame/ chiseled-featured dude duo.
I'll bet that the Jewel Full of Murder was a big attraction at the Seven Wonders museum they end up putting together at the end of the story.