Which MC? Mage/ thieves can't wear shields, so it doesn't fit my MC.
That is correct. Casters or thieves can't do much with the shield, of course. I took the classic archetypal and outdated approach of a tank / brute fighter or pala hero as MC. I kept in my mind that Gorion's Ward was canonically declared a fighter, regardless of other details. Which makes sense, since Imoen is the thief and later also a mage. After all, there are a lot of “class cannons” at the very beginning of BG 1 and a lack of toughness.
Back in days it was always fun to me playing a warlock apprentice as Gorions Ward but my very first character was indeed a paladin. If you remember the later course of events, that Balthazar was pretty much the only supposedly good class / character with Bhaal essence, then a paladin who struggles with his heritage and overcomes it under the guidance of Gorion and the Harpers makes the most sense to me personally. One has to put into proportion that not all Bhaal characters / classes were evil, but somehow only the MC, Imoen and Balthazar were somewhat “good aligned” (depending on how you play). Having only Balthazar, who rejects his heritage, is not differentiated enough for me.