I know that the Jman in the 5 champions wasn't specifically named or a hero but two thoughts on that.
There were very few Jmen Probably less than 1000 and probably less than 100 by the end of the war. they were ALL heroes.
Also from Myth Two's Stair of Greif.
" Twelve Motion Jeweled Skull says he was last here sixty years ago, fighting alongside the likes of Durak and Turgeis with Burning Steel. They caught The Deceiver and the remnants of his army in this very defile and here destroyed them."
I like to think that canon wise that the Jman that was with them was Twelve Motion Jeweled Skull here even though its not really official