This model came in the same job lot purchase from eBay as the AD&D Assassin shown previously. He is of course Harald (Harry) the Hammer.
There’s been three versions of him over the years that I’m aware of. An early 80s pre-slotta version based on the WFB 1st Ed box cover art, a 2008 25th Anniversary limited edition Chaos Warrior and this one from the ‘Heroic Fighters of the Known World’ box set circa 1987.
I’ll count this as a Knight for now rather than a standard Soldier although I do have boxes of both Fireforge Deus Vult Templar and Teutonic Infantry to make up which probably fit the bill better.