I didn't really check out the Undertale or Smaug ones, since I haven't played Undertale or even watched the Hobbit movies, so I can't really give a fair judgment on them. But I did check out the Dracula one.
I actually... quite like it. Mind you, it's not GREAT by any means, but I wouldn't call it CRAPPY either. The entire time I listened to it, I could easily imagine you in a PC Engine game. Not one of the crappy dubs like Dragon Slayer or Valis 3, but in one like Ys Book I & II. I imagined the voice clip in the latter game with Adol walking up to some villain and their face popping up on screen for them to give him a speech in their 2-frame lip-flap animation. lol
That being said, I think that your Drac voice would actually work for Darm in that game.