http://bit.ly/aafreeclass
While designed for the Pulp-era adventures of Amazing Adventures this class also would work fantastic with Castles and Crusades.
The class is much more "Buffy" than it is "Solomon Kane" but you could do either with it. Mostly though it reminds me of John Gregory, the Spook, from the "Last Apprentice" book series.
It compares well to the Paladin really, except it doesn't have healing, spells or a special mount. It does have supernatural senses and a special weapon.
Just another reminder that I need to play more Castles & Crusades.