In addition to being a ranger(or at least a 1 level dip into it) expedition to castle ravenloft(oddly) has a few undead fighting based feats and items.
Also (if you’re willing to import from pf, or are using pf) the crossbow based ranged may be a interesting option flavour-wise, it also has a crunch benefit if you’re using the alchemical flare bolts from expedition to castle ravenloft.