The Sword of the Gods and the Nobleman's Sword are potentially the best one handed swords in the game (at #1 and 2, respectively), but there are other good swords, as well. IIRC purchased bastard swords are one handed, and can have quite good stats (check with the smith in Ars Magicana). Seth drops a potentially good sword (one handed, I think) if you kill him before the healers leave Aleroth (if you cast Poison Cloud near an NPC, but not directly on them, they will take damage but not turn hostile, and you will not loose any reputation). The Singing Blade, dropped by Pedro in the Ars Magicana sewers, can also be good...
Here is an old topic about
One Handed Swords, with relevant discussion and links to a couple other topics. Screenshot links are all broken by now, but the majority of stats got typed as well.
I'm assuming that 68 stat point bonus on the amulet includes a few charms?
The highest stat bonus I got (at least on equipment that I kept and used) was 10 to any particular stat (not counting the one charm I used), and at most about 18 spread over several stats. I always tried to maximize the damage of weapons or the armour class of armour, though, which reduces the quantity and quality of available bonuses.