Characters you like, think were given opportunity, but just didn't break out

[Tzigone]

This thread is prompted by another thread (well, several) where posters complain that their character (or group of characters) just didn't get a push by DC - didn't get promoted (crossed over in other books, etc.) and really would have been a top-ten player if only DC had marketed them better.

On the other hand, we have "creator's pet" type threads where everyone complains about a character being overused and such - when they don't like the character.

So what I'm looking for here is people who think the character they liked was well-written, given opportunities to guest in other books (be exposed to other audiences), but still somehow just failed to capture a wider audience. One where you acknowledge that DC didn't screw up - they gave the character opportunities - but it just didn't translate into major popularity or sales.