Gargog, the forever running Chaos warrior, struck me as one of the most dynamic oldhammer minis Citadel ever made. There are really not a lot of sculpts that are in full running mode - in the CH2 range from 1985 he really stands out. It's almost like he doesn't fit in, compared to the other models, and although we know which sculptors worked on the range (Jes Goodwin, Bob Naismith, Aly Morrison) I am not sure which of those three made Gargog. I am going with Jen Goodwin, the mini sort of reminds me of the woodelves that he would sculpt later in the decade.
The original model actually comes with a bit of metal going from the back of the tab to his back foot for more stability but I took it off. I think it looks a lot better without. You can see that below in the sales pic
I recommend you finding this little guy, he's a great mini and not that popular, I would think you could find him for 10 bucks somewhere and enjoy a week of painting.