What's step-based mean?
I recommend (highly!) Summoner 2. There's also Summoner 1, but I get motion sick from the camera if I'm not careful... S2 is a fantastic game. I have odd tastes, so you might not like it as much as me, but I put it right up there next to an unmodded Morrowind and an Okami - and that's saying a lot, let me tell you.
Demon Stone has DnD stats and skills, but is mostly an action game. You get to control all three characters on-the-fly. Item purchasing and skill level-ups occur at the end of each level/chapter of the game.
For other RPGs: Drakan: The Ancients Gates, King's Field. Drakan is sort of a mix between action, rpg, and adventure. I haven't played much of it, though. I only played a little bit of King's Field.
For hack-n-slash dungeon crawlers, there's Baldur's Gate: Dark Alliance 1 & 2, Champions of Norrath, Champions: Return to Arms. I think the game Barbarian and Gauntlet: Dark Legacy are also hack-n-slash.
I've played BGDA1, it was okay, a tad easy, but has a very thin story. Return to Arms was pretty fun, I enjoyed the skill trees and variety of locations. Unlike CoN, environments and dungeons are not randomly generated, which slightly reduces replay value. Game enjoyment for both series might increase if you play co-op with friends.
None of the games I mentioned are turn-based at all. For Summoner 1 and 2, the game will pause when you open up the HUD menu for spells and skills - you select what you want and then target an enemy. Everything is real-time, though, no artificial "I'll stand here any let you attack me until it's my turn" sort of thing.
If you haven't played it already, I also recommend Okami. It has some RPG elements: side quests, and character attributes (to a somewhat limited degree). Three weapon choices, learnable weapon moves. Although you discover the world linearly, after you go somewhere, you can revisit it whenever you want. It might not really be an RPG, but it has RPG elements.