Source: comicsalliance.com

5. Metamorpho

This one is finally starting to get the credit it's due, but not enough credit and not soon enough.

To put it simply, this was "˜60s DC making a "˜60s Marvel Comic. Rex Mason was a hero in the classic monster mold, with a swingin' slang-filled vocabulary and a tragic origin. He was a Marvel Character. In the DC Universe. And they knew it, too.

That two-issue arc in which Metamorpho parodied Galactus’ first appearance less than a year later? That thing was great. Plus, it was one of the few comics of that time that really arced its characters well. And of course, because of that, it was cancelled. That's why I feel comfortable sticking this entire run on this list; it was so short.

And you can get the whole thing, plus Metamorpho’s Brave and the Bold and Justice League of America appearances, in one of those big, gorgeous Showcase Presents volumes. If you only ever buy one of those, you should make it this one.