All the "Crest" shields are good, Shield of Want is 100% physical and increases the amount of souls you get per kill, and the Black Knight Shield is great for its effect, too.
My favourite is the lothric knight shield, both for looks and stats. It's all around decent, with good lightning res. And at +10 it has like 67 stability I think which for a shield this size is pretty good and enough for most hard hitting bosses.