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Dracula's Guest, maybe? The narrator is usually assumed to be Harker, but he isn't named in the story. Certainly, some subsequent media portrayals have had Renfield as the first solicitor to visit Dracula.
A friend of mine had the game, and a few of us played it begrudgingly (because it wasn't Warhammer), but then really enjoyed it. I don't remember that much about it, except that we were surprised by how good it was.