I would point you in the direction of The Griffon's Saddlebag -
Reddit - The heart of the internet - there are a mountain of really interesting magic weapons there. For example, one I gave out in my Phandelver campaign was a magic axe that negates Incorporeal for 1 minute. A minor magic item - uncommon IIRC. But, so much more interesting for a character that was focused on undead hunting than a flaming sword.
/edit to add. Poke for
@Lanefan. Here's one of the, IMO, best repositories of magic items out there. This is all I ever use.