Icewind Dales are fairly obvious choices, although it must be said that those put a heavy emphasis on combat (thank fuck for ditching the AD&D ruleset). You create your own party from scratch, so there's none of the companion banter that you got in Baldur's Gate, and both Icewind Dales have a plot to give you an excuse to fight monsters, not because the developers thought it would be a nice story for people to experience.

Planescape: Torment does things the other way around: the combat mechanics are clumsy, but in exchange you get one of the best video game stories ever written (or the best to many people, including myself). You may have guessed this already, but Baldur's Gate slots somewhere in between Torment and Icewind Dale in the story-to-combat spectrum.

Neverwinter Nights 1 is, frankly, somewhat boring, but bear with me. The original campaign is lackluster - you only get one semi-autonomous henchman in addition to your character - but the expansions are quite good, and there's a metric fuckton of community-created independent campaign modules available, and I've heard that some of them are really very good indeed.

NWN2, for all its flaws, is good, and is independent of NWN1 (a few irrelevant references notwithstanding). Unlike in NWN1, you get a full party to run around with, and even the story is rather decent if a bit cliché-riddled. Mask of the Betrayer is wonderful, and I've heard that the other expansions aren't too bad either. Again, custom modules are available if you're into that sort of thing.

As for Dragon Age, I would recommend against it. It's well written, which is what you would expect from BioWare, but I think the world was boring and the combat worse still. I'm not sure if I would call it a bad game, but to me it certainly isn't the spiritual successor to Baldur's Gate that it was supposed to be.

I know that this is probably an unpopular opinion, but I wouldn't recommend Knights of the Old Republic either. I got somewhere around fifteen hours into it, and it bores me to tears with its ridiculously oversimplified mechanics and standard run-off-the-mill Star Wars setting that places jarring restrictions on moral choices, characters and dialogue.

If you want new-ish games that are a kind of break from the norm, try the Witcher series.