The green you mentioned must be the Death Dealer by David Soderquist of Bronze Age Miniatures (ulfr on CMON). An awesome sculpt, but done purely for personal satisfaction and not licensed so therefore not on the market.
There were 2 miniatures by Ral Partha in the late 70s that were clearly the Death Dealer (1 mounted, 1 on foot) called Super Hero, mounted and Super Hero. Must not have been licensed either. I have the mounted version and it is an ok figure for when it was done, but the one on foot is just awful and I sold it off in an ebay auction. I also have a figure that is obviously Darkwolf from Fire and Ice but have never been able to figure out who made it - it is an old piece but pretty well done. Also, Cell Entertainment was supposed to have a Death Dealer miniatures skirmish game out a couple of years ago, but it never happened and the company appears to have gone under. I saw a picture of one of the figures, so they must have produced a few - I would love to get my hands on them.