I'm disappointed that there isn't more fan art of The Herculoids on the web. Maybe I shouldn't be surprised; the original series is 43 years old(!), and even the Space Stars revival series dates back 19 years, so that even the typical comics/animation fan of today would have little or no personal contact with them. But I have found a few fan art pieces on deviantART, and I've even drawn a couple myself.
Herculoids by ~Ferigato on deviantART
HERCULOIDS by ~nocturnals23 on deviantART
The Herculoids by *nelsondaniel on deviantART
And, my own contributions:
Tara and Zok - fanart by *dcmatthews on deviantART
(I see I got Tara's dress color wrong.)
Tara Attacks - fan art by *dcmatthews on deviantART