This will make you a walking tank.
Any weapon that can stunlock someone in heavy gear. 2 handed Katana's, Greatswords, etc.
Havels Helmet, IronClad Armor, havels Gloves, Havels Leggings
Third Dragon Ring, Ring of Soldier +1/+2, Cloranthy Ring
This is NOT a light build. You heavy roll. The objective is not to dodge but to poisetank when possible. Do not attempt to trade with Magic Crystal Weapon. Do not attempt to dodge spells and pyromancies. You have shields that will mitigate almost ALL the damage.
You can NOT be backstabbed while wearing IronClad Armor.
Use Havels shield at all times. If you meet a player you know will be using pyromancy, a +10 Gyrmshield can be swapped to nullify 100% of firedamage.
If you want good movesets however, the Longsword or the Sunlight Sword have some of the best. Be warned they will not poisebreak heavy armor, even 2 handed.