Paladin (Vengeance or Oathbreaker)/Rogue? The Gauntlet of Shar is essentially a promotion from Cleric (acolyte) -> Paladin (elite holy warrior of Shar). Paladin gets extra attack, smiting, and cleric-y spells, and rogue gets expertise for stealth. The Oathbreaker paladin abilities are even necrotic, matching with the armor. Unfortunately, you'll be super MAD. Strength, Dex, Con, and Cha (although honestly Cha is not strictly necessary for Paladins).
Otherwise, Cleric/Ranger (Gloomstalker) isn't bad. 5 levels of Ranger will get you that much-needed Extra Attack. You'll only need Str, Dex, and both classes double up on Wis. Rangers also get you the Favored Enemy (apt for followers of Shar) and Natural Explorer->Urban Tracker gets you Sleight of Hand proficiency.
