Diablo II/Act II

Drognan
Is the guy who is similar to Akara in act 1, he sells wand, armor(some) and staffs. He also provides town portal and some potions

Elzix
He is like Gheed in act 1, he gambles weapons and sells level one weapon to you

Deckard Cain
He is from act one who identify your items and have something interesting to say

Farah
She can heal you and sells weapon, armor and arrows to you.

Quests

 * 1) Radament's Lair
 * 2) The Horadric Staff
 * 3) The Tainted Sun
 * 4) The Arcane Sanctuary
 * 5) The Summoner
 * 6) The Seven Tombs