If age isn't an issue, then I'd suggest the Might and Magic series. Both 7 and 8 are the most recent and quite interesting - you can get them off GOG. M&M6 is also OK but if it matters you cannot get it in its own, it comes with all Might and Magic games 1-6 on GOG.
Other than that, let's see - Gothic should be something you'll like. Swords magic, fantasy, has all of it.
Arcanum Of Steamworks and Magick Obscura - it's quite cool, indeed. It's D&D duirng the undistrial revolution, more or less.
Arx Fatalis is the granddaddy of Dishonored. And it's more of an RPG. It is first person again and you can do some interesting stuff, like combine items to get other items (stick and a piece of string for a fishing rod, for example). It also had a somewhat interesting take on magic - you draw runes in the air to invoke the effects. Or you can memorise a limited amount of combinations as quick cast spells.
Dark Messiah of Might and Magic (has nothing in common with the M&M series of games) is the son of Arx Fatalis, so the daddy of Dishonored. It is in many respects similar to its predecessor but has interesting stuff on its own.
Fate if you want yet another Diablo clone in the line of TL. I think that too had some former Blizzard employee in its team. Dunno, I played it for a bit and it seemed like Diablo 2.1 - pretty much all of it was the same. Then I stopped playing it - never got far into it.
Sword and Blade was another. A more eastern themed Diablo clone, if I remember correctly. It had cool concepts but I never managed to finish it because there was no indication that I had to grind more at lower levels. I reached the final boss (it was QUITE hard) but I was so underlevelled I had almost no chance. So I quite. Because I couldn't go back to previous settlements to grind responsibly. I didn't quite like it but then again, I'm willing to give it another shot now. If I can be bothered.
Titan Quest is another Diablo clone. I think one of the best ones. I don't know much else just that it's recommended to get the expansion.
Sacred 1 and 2 is not like Diablo but still an ARPG. I remember playing the first one - I never finished it, but it had the option to build your own combos and such.
Nox is another not Diablo but an ARPG (it came before Diablo) and it's an often overlooked game. It's quite interesting and engaging. It is also one of the few games I've seen where each character class has their own story. They travel through some of the same areas but otherwise it's different paths and challenges for each.
Icewind Dale - You don't have them but they are usually put in the same place as Baldur's Gate and Planescape. Or at least I always think of them in therms of these three - BG, P:T, and IWD - a D&D trio
The Temple of Elemental Evil - another D&D game but I haven't played it myself. From what I've heard, it's one of the best games in terms of incorporating the D&D mechanics. Haven't heard much else, I assume the rest is OK but not noteworthy.
And if we are to move over from traditional fantasy, Vampire the Masquerade - Bloodlines and Redemption. Bloodlines is hands down the better one. Redemption is also good, if you're into vampires - it has more of the setting, the story is passable, the gameplay...it portrays the powers of vampires quite well but the friendly AI is...how should I put it, somewhat mentally challenged, I suppose. Your teammates would just go all out in any fight - a rat? I BETTER SPEND ALL MY BLOOD RESERVES! Fortunately, you can turn off the AI and control them yourself. Other than that, it seems a bit like a Neverwinter Nights game with a coat of Vampire over it, as in, you'll have a group of teammates, you travel together, each has their inventory and items and so on. You even start in the dark ages using swords and travelling through crypts and so on, later on you get to modern times, though.