The katars from haven's weapon shop are fun (plus the one obtained after quest found in same shop). Earth and Water katars damage sp and mp. Fire katar burns, ice katar freezes, shock katar paralyzes, and i don't remember what the darkness katar from the quest does.
Zealot's wrath, no fun statuses, but deals more damage at cost of taking more, and boosts lucky strike rate and/or damage depending on which mode. Preium item though.
The wind sword from Fuijiin set quest (in the extra shop) only deals like 68% damage, but it never misses.
I don't use melee much, so can't add any more.