I haven't played many of the D&D retro games but I think I know a few you might like.
Retro Uprising - Arcade - Might And Magic III Isles Of Terra - Great game. It's "borrows" heavily from D&D stuff, in other words if you like D&D you'll have no trouble with this game. I used to play it a lot years ago and I'd recommend it to anyone who likes long RPGs with lots of content. It's first person though, not sure how you feel about that.
Retro Uprising - Arcade - Buck Rogers - Countdown to Doomsday - Not D&D either but if I remember right it uses the same dice roll mechanics for combat. Either way it's a good retro RPG that you'd probably enjoy.
Retro Uprising - Arcade - Wizardry V Heart Of The Maelstrom - This is a rough game. It's also D&D styled but it's not for the casual RPG fan. Besides being kinda boring to look at and having unimpressive combat the game is also very unforgiving. If a character dies and you have no way to bring them back then you have to drag their body back to town or leave them there and make a new one when you get back to town. That being said it's probably one of the more faithful D&D inspired games I've played on a retro console.