Rereading the Nero Wolfe corpus again (3rd time through for it, this time in in-universe order) after having gotten samples of some more authors in since last time, and a lot of detective TV shows.
Neither "Fer-de-Lance" (1934) nor "The League of Frightened Men" (1935) will come in near the top of my all time favorites list, but they do have parts that show Rex Stout can really write and is a great builder of recurring characters.
In comparison, it wasn't Alleyn that kept me reading Marsh (she is great at setting up the story specific characters before Alleyn gets there), nor Grant his early Tey books (she can really write in general). As far as a "series", Hammett's Continental Op has an interesting protagonist to go with the great writing - but I don't know if I ever really care about the Op as a person. Jones's Pinkerton and Bull had the downside of not being as strong of characters nor having that level of writing, and Sayer and her Wimsey haven't gotten me to pick up book 4 of that yet. I think Archie's narration for the Wolfe cases might have been able to pull me through even if the writing wasn't near as strong as it is.
After those first two in the series, "O Careless Love!" (1935) isn't listed as a Wolfe related book, but it does have an upscale Restaurant in NYC called Rusterman's, so I slotted it in. It's a romantic-comedy, and I think I liked it even more this time through. (I imagine one of the characters having the voice of Gale Gordon from Our Miss Brooks). On the down side it isn't a detective story and it doesn't have Archie, Fritz, or Wolfe. On the plus side it was a very well-written, fast, fun read.
Near the beginning of "The Rubber Band" (1936) now.