I’m not sure of that. I played Baldur’s Gate where Paladins are rather 2h sword users. Not only you meat Keldorn who is a Paladin specializing in them and has his own custom 2h sword but also one of the best weapons in the game - Carsomyr - is a 2-hander that can only be wielded by Paladins.
Also Paladin using a 2hander: [1.1.9.1] World Police and Friendly Fire - 5 Guardians of Empyrion Paladin [4.20 Crucible] [SR75] [All Celestials] although it’s just a stat stick, the character doesn’t actually fight with it so I guess it doesn’t count.