If you like Diablo for PC, then you'll probably like Dungeon Explorer: Warrior of Ancient Arts. It's similar to Diablo in playing style, and the graphics could be considered damn close.
Master of the Monster Lair isn't exactly a dungeon crawler, per se, as you make the one dungeon you explore for the whole game, but it's considered a dungeon crawler.
If you need a first person fix, try Fighting Fantasy: The Warlock of Firetop Mountain. It's a great little game that at first glance appears to be very similar to The Elder Scrolls, but is more of a dungeon crawler than an awesome world of awesome. Kind of lackluster, though, and the graphics aren't exactly top notch.
There's also The Dark Spire, which is a throwback to those old first person adventures on the older systems/computers. I didn't really like it, but it IS a nice looking little dungeon crawler if I ever saw one.
There's also Soma Bringer and Phantasy Star Zero, as others have already said.
I don't blame you, Soma Bringer is pretty awesome, what with the skill trees, smash-em-bash-em gameplay, intuitive controls, awesome graphics, pumpable equipment... and the storyline's topnotch. it's the whole shebang.
don't forget to hunt for them side-bosses! those are sick. XD
big fan of Shiren the Wanderer though (and Rogue. and Nethack, for that matter. and Angband. XD). it's ridiculously unforgiving. you really can't afford to go slack for one bit, not even if you think it's safe. finishing it though is extremely satisfying as well, and the weapon grinds are heavenly--just don't forget to focus in combat. nothing sucks more when you lose that +50 weapon with tons of mods because you weren't paying attention to that monster that disarms you and sends it flying awaaaaaay~... T_T
also on a related note, i should start treating my keyboard better, my friend saw my keyboard while visiting my house and he said "holy shit why is it this dirty do you like shove it up your ass right after you clean it or something"