Lendelin: Oh! Check out Choro Q. It's a racing series with tiny toy cars, but set up like a traditional RPG. You drive around town, talking to NPC cars. Collect side missions, and race for money and level ups. It was published by ATLUS and they even advertise it as a "racing roleplaying adventure". I think it at least deserves a border-line inclusion. There was also a PS2 sequel released as Road Trip.
Baldur's Gate and other Norrath engine games - Diablo clones. XP based level ups? Check. Equipment? Check. Side Quests? Check. Over-arching story quest? Check. Exploration? Check.
So what doesn't make Diablo an RPG exactly? In fact Diablo (and specifically the games you called out) are rogue-likes, RPGs characterized by their randomized dungeons and loot drops.
Kings Field - Precursor to the Dark Souls series for starters. A first person RPG in the vein of the Elder Scroll games. Again features stats, level ups, and exploration. You could also liken it to a real time Wizardry, or Might and Magic.
Kingdom Hearts - Riiiight.
Odin Sphere - Side Scrolling action RPG... you know what I'm just starting to think you don't know what an action RPG is.